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Traceability System Element: Tracking Movement and Transactions of Products Throughout the Supply Chain

Product Tracking: The Basics

Companies already track the movement of products through their supply chains for all kinds of reasons: food companies track the movement of ingredients to ensure food safety; automotive companies track the movement of products to ensure consumer safety; companies in all sectors track the movement of products to enable forecasting and to generally optimize supply chain efficiency. The business community’s longstanding familiarity with product tracking for these purposes is a jumping off point for harnessing product tracking to combat labor abuses.

Most methods of tracking products for any purpose allow companies to make claims relevant to the Chain of Custody of goods in their supply chain. Chain of Custody refers to a record of the series of supply chain entities that had physical possession of a product or materials. (Note that one form of product tracking, certificate trading, does not support Chain of Custody claims. However, authoritative reports in the field such as A Guide to Traceability by the United Nations Global Compact and BSR, and ISEAL’s Chain of Custody Models and Definitions report include certificate trading under analyses of the product tracking field.) This focus on the Chain of Custody of goods and materials differentiates Product Tracking from efforts like supply chain mapping that identify and enable engagement with supply chain entities, separate from the movement of any specific good or batch of goods.

The multiple methods that fulfill a product tracking functional element vary in terms of requirements to segregate batches of product, the Chain of Custody requirements, and the resulting claims that can be made.

Product Tracking & the Intersection with Labor Due Diligence

How can tracking the movement of products help combat forced labor and child labor in supply chains?

All approaches for tracking the movement of product through supply chains can help companies move towards more ethical supply chain practices.

Many approaches to tracking products that focus on sustainability specifically are centered around tracking and documenting the Chain of Custody of batches or volumes goods or materials as they are produced, aggregated, and/or transformed by supply chain entities that can demonstrate compliance with social responsibility or other sustainability standards, often under the umbrella of a certification scheme or another voluntary sustainability initiative. (For more examples of how certification schemes support traceability in a range of sectors, see the Examples page). To be considered credible labor and human rights due diligence approaches, voluntary sustainability schemes (including certification schemes) should:

  • have standards that are aligned with ILO core labor conventions and clearly address issues such as forced labor and child labor;
  • access and reflect the voices, experiences, and needs of workers and their advocates; and
  • outline a comprehensive plan for integrating worker experiences into due diligence systems to address risk and abuses.

For more information on assessing the degree to which certification schemes and other voluntary sustainability initiatives address serious labor rights abuses, see: Responsible Sourcing Tool’s Evaluating the Anti-Trafficking Requirements of Voluntary Sustainability Systems.

Downstream companies participating in traceability efforts that leverage certification or other voluntary sustainability schemes that meet these benchmarks can support improved conditions for workers at participating worksites and provide market incentives for producers to continue producing socially responsible goods.

In supply chain contexts where certification schemes that adequately address forced labor and child labor are not available or feasible, it is still possible to implement product tracking approaches that support labor rights due diligence goals by leveraging the supply chain information surfaced by product tracking approaches. For example, tracking products for the purposes of consumer safety, quality control, or fraud control can be leveraged to surface information about the identities of supply chain entities taking possession of goods and materials and the relationships between these entities. These approaches also typically require commercial procurement teams to build relationships with suppliers to implement these systems; the relationships stemming from this engagement are powerful resources for driving future due diligence and compliance efforts.

Product Tracking Method: Identity Preservation

Identity Preservation Product Tracking: The Basics

Identity preservation is a type of tracking method enabling a product or component of a product to be traced back to a single point of origin. It is important to note, however, that the level of granularity of this origin point can vary (i.e. to an individual farm or facility, to a region, or to a country). When conducted at a regional or country level, Identity Preservation is similar to Bulk Commodity product tracking. Identity preservation differs from other Product Tracking traceability methods in that product from a certified or otherwise designated source is kept separate from materials from other sources, including from other certified or otherwise designated sources. This degree of segregation allows visibility to sources of the material as well as supply chain transaction points for a specific batch of products if identity preservation is maintained throughout a supply chain. Identity preservation is typically viewed as the most comprehensive traceability method, although it is also considered to be resource intensive and may not be feasible in certain supply chain contexts. Note that there is not a single definition of Identity Preservation, although leading definitions overlap significantly. For more on the International Organization for Standardization (ISO) definition, see ISO 22095:2020(en) Chain of custody — General terminology and models. For more on ISEAL’s definition, see ISEAL Guidance: Chain of custody models and definitions.

Potential Benefits of Using Identity Preservation Product Tracking for Downstream Users

BenefitApplicable?
Provides information on origin of good or material in actual physical good Yes
Provides information on geographic locations of transit points of actual good along supply chain In some cases, if there is batch-level tracking occurring throughout the supply chain.
Provides information on transactions between entities along supply chain tied to specific good/batch of goods (Chain of Custody)Yes
Provides information on location and identities of entities along supply chainYes
Provides information on sourcing relationships between entities along supply chain such as indirect suppliers and facilities management groupsYes
Provides information on volume of certified or assessed sustainable product supported by purchase Yes
Supports collection of information about labor conditions, or access to / reflection of the voices, experiences, and needs of workers in the supply chainIn some cases, depending on the presence and strength of the associated certification or other voluntary sustainability scheme. When used alongside a credible certification or voluntary sustainability scheme with strong labor rights standards and a mechanism for accessing and reflecting the voices, experiences, and needs of workers, identity preservation can act to attach information about working conditions to a specific batch or volume of material. On the other hand, some forms of the identity preservation model -- such as tracking the chain of custody of a batch of product for food safety or anti-fraud purposes -- will not collect any information on working conditions. Many models of identity preservation will be somewhere along this spectrum, for example, by offering assurances that supply chain entities have systems to address labor rights, but not directly surfacing credible information on actual working conditions in practice.
Decreases market for unethical goods and increases market for goods produced with less FL/CL risk; Provides structure to drive increased value to producers and suppliers with demonstrated commitment to labor and human rights due diligence In some cases. Because of the challenges of implementing at scale, particularly in complex supply chains with multiple points of aggregation and transformation, insistence on an identity preservation model may actually hinder participation of small-scale producers and suppliers – and therefore access to market access and a return on investment.
Facilitates increased engagement with supply chain actors Yes. Implementation of identity preservation typically requires some degree of pre-engagement with participating suppliers. The scope of that participation will vary depending on the level of granularity of the identity preservation approach being implemented as well as the specific technologies used. As noted above, participating in some forms of identity preservation may not be feasible for smaller suppliers with limited financial or administrative capacity.

Identity Preservation Product Tracking & Labor Due Diligence

How can identity preservation help combat forced labor and child labor in supply chains?

Examples of Identity Preservation

What are some examples of identity preservation product tracking that could be used to combat forced labor and child labor in action?

Operationalizing Identity Preservation Product Tracking in the Supply Chain

What supply chain characteristics would support the use of identity preservation product tracking?

  • There is evidence of the most serious labor/human rights abuses in a particular sourcing region or among certain producer types.
  • Consumer and/or regulatory demand for assurance is tied to a specific physical product in a company’s supply chain.
  • Entities along the length of the supply chain have the capacity to implement Chain of Custody requirements.
  • The producer base is well organized and has the capacity to participate and implement any technical requirements.
  • Downstream supply chains are relatively vertical/streamlined, and there are limited points of aggregation and transformation.
  • The value chain can support higher financial investments needed for logistics to maintain an identity preserved Chain of Custody.

Identity Preservation Product Tracking & Supporting Technologies

What tools and technologies can support identity preservation product tracking?

Implementing a traceability system that preserves the identity of a good from origin to retailer requires significant technological support.

Functionality NeededPotential Facilitating Technology Types
Creating an identity for an individual good or batch to which Chain of Custody information and other desired information can be attachedTags
Additive Tracers
Identify certified or other designated product as distinct from other productTags
Additive Tracers
Documenting transactions throughout length of supply chain, including points of aggregation or transformation, if relevantTransaction ledgers (e.g., blockchain)
Digital Chain of Custody Platform

Product Tracking Method: Bulk Commodity

Bulk Commodity Product Tracking: The Basics

Like Identity Preservation product tracking, the Bulk Commodity method of product tracking also requires that certified or other designated materials be kept separate from non-certified/non-designated materials. However, Bulk Commodity allows mixing of products from different producers, so the origin of goods in any specific physical product cannot typically be identified to the level of individual producers – although identification of origin of goods to national or regional level may be possible (Bulk Commodity product tracking is similar to country-level Identity Preservation product tracking in this way).1“The certified products are mixed but the documentation may retain specific origin information to denote the origin from a specific region or country in the claim.” ISEAL Guidance: Chain of custody models and definitions. ISEAL, 2016, www.isealalliance.org/sites/default/files/resource/2017-11/ISEAL_Chain_of_Custody_Models_Guidance_September_2016.pdf. Further, depending on how a scheme is implemented – both in terms of supply chain structure and the use of digital platforms to capture and display transactional data – it may be possible to leverage a Bulk Commodity traceability program to allow downstream companies and suppliers to gain visibility into the identities of upstream producers and suppliers who contributed to the total volume of a certified good purchased.

Potential Benefits of Using Bulk Commodity Product Tracking for Downstream Users

BenefitsApplicable?
Provides information on origin of good or material in actual physical good In some cases
Provides information on geographic locations of transit points of actual good along supply chain In some cases
Provides information on transactions between entities along supply chain tied to specific good/batch of goods (Chain of Custody)Partially
Provides information on location and identities of entities along supply chainIn some cases
Provides information on sourcing relationships between entities along supply chain such as indirect suppliers and facilities management groupsIn some cases
Provides information on volume of certified or assessed sustainable product supported by purchaseYes
Supports collection of information about labor conditions, or access to / reflection of the voices, experiences, and needs of workers in the supply chain In some cases – depending on the presence and strength of the associated certification or other voluntary sustainability scheme. When used alongside a credible certification or voluntary sustainability scheme with strong labor rights standards and a mechanism for accessing and reflecting the voices, experiences, and needs of workers, bulk commodity product tracking can act to “attach” information about working conditions to a volume of material. On the other hand, some forms of the bulk commodity method will not collect any information on working conditions. Many models of bulk commodity product tracking will be somewhere along this spectrum –for example, by offering assurances that supply chain entities have systems to address labor rights, but not directly surfacing credible information on actual working conditions in practice.
Decreases market for unethical goods and increases market for goods produced with less FL/CL risk; Provides structure to drive increased value to producers and suppliers with demonstrated commitment to labor and human rights due diligenceIn some cases. It is helpful to note that because bulk commodity models are not as intensive as full identity preservation methods, they may be more feasible to implement for a broader range of producers and suppliers.
Facilitates increased engagement with supply chain actors Yes. It is helpful to note that because bulk commodity models are not as intensive as full identity preservation methods, they may be more feasible to implement for a broader range of producers and suppliers.

Bulk Commodity Product Tracking & Labor Due Diligence

How can bulk commodity help combat forced labor and child labor in supply chains?

Examples of Bulk Commodity

What are some examples of Bulk Commodity Product Tracking that could be used to combat forced labor and child labor in action?

Operationalizing Bulk Commodity Product Tracking in the Supply Chain

What supply chain characteristics would support the use of bulk commodity product tracking?

  • Evidence of the most serious labor/human rights abuses at a national level or amongst certain types of producers/suppliers (i.e. risk could be addressed by sourcing from certified or other designated producers participating in a scheme with strong labor rights standards and mechanisms to access and reflect the voices, experiences, and needs of workers).
  • Consumer and/or regulatory demand for assurance is tied to a specific physical product in the company’s supply chain.
  • Consumer/regulatory demand does not require the ability to identify individual producer of origin.
  • Entities along the length of the supply chain have capacity to implement Chain of Custody requirements necessary to segregate certified materials from non-certified materials.
  • The producer base is relatively well-organized.
  • Downstream suppliers/processors are relatively vertical or streamlined, although bulk commodity traceability is likely to be more feasible than identity preservation product tracking in supply chain contexts with moderate levels of aggregation and transformation.
  • The value chain can support higher financial investments needed for logistics to maintain segregation of certified products – which is likely less cost-intensive than identity segregation, but still requires a relatively high level of investment throughout the length of the supply chain.

Bulk Commodity Product Tracking & Supporting Technologies

What tools and technologies can support bulk commodity product tracking?

Functionality NeededPotential Facilitating Technology Types
Creating an identity for an individual good or batch to which Chain of Custody information and other desired information can be attachedTags
Additive Tracers
Identify certified or other designated product as distinct from other productTags
Additive Tracers
Documenting transactions throughout length of supply chain, including points of aggregation or transformation if relevantTransaction ledgers (e.g., blockchain)
Digital Chain of Custody Platform

Product Tracking Method: Mass Balance

Mass Balance Product Tracking: The Basics

Mass Balance2Note there are multiple widely used parameters for different types of Mass Balance. ISEAL provides definitions for: Group, Site, and Batch-level mass balance, as well as alternative names for Group: “multi-site;” alternative names for Site: “controlled blending” and “factory gate mass balance;” alternative names for Batch: “percentage blending and batch blending.” Source: ISEAL Guidance: Chain of custody models and definitions. ISEAL, 2016, www.isealalliance.org/sites/default/files/resource/2017-11/ISEAL_Chain_of_Custody_Models_Guidance_September_2016.pdf. ISO provides a definition that does not break out various levels of the mass balance approach, and instead describes a chain of custody model in which “materials or products with a set of specified characteristics are mixed according to defined criteria with materials or products without that set of characteristics.” Source: ISO 22095:2020(en) Chain of custody — General terminology and models. ISO, 2020, www.iso.org/obp/ui/#iso:std:iso:22095:ed-1:v1:en. is a traceability method that allows materials with specified sets of characteristics (such as being produced or processed by certified suppliers and/or originating from a specific geographic region) to be mixed with materials without those characteristics, according to defined criteria as the product moves along the supply chain. However, a Mass Balance approach does require supply chain entities to control and document the total volume of claimed material in a value chain, ensuring that the total volume of claimed goods sold does not exceed the total volume of claimed goods being produced. Mass Balance systems can vary based on the point in the supply chain that it is permissible to mix certified and non-certified materials, as well as whether mass balance is applied at the batch, site, company group, or country-level (or any combination of these elements). Typically, the use of Mass Balance systems does not support making claims attached to a specific physical product because the volume of claimed or designated material in any specific physical product will vary.3ISEAL Guidance: Chain of custody models and definitions. ISEAL, 2016, www.isealalliance.org/sites/default/files/resource/2017-11/ISEAL_Chain_of_Custody_Models_Guidance_September_2016.pdf.

Potential Benefits of Using Mass Balance Product Tracking For Downstream Users

BenefitsApplicable?
Provides information on origin of good or material in actual physical good No. Mass balance approaches may in some cases provide information on the geographic origin of the volume of certified or designated goods entering a supply chain, but mass balance methods of product traceability do not support attaching this origin information to any specific physical product.
Provides information on geographic locations of transit points of actual good along supply chain No
Provides information on transactions between entities along supply chain tied to specific good/batch of goods (Chain of Custody)In some cases. Information on transactions will be collected to some degree – depending on the point in the supply chain where it becomes permissible to mix certified/otherwise designated materials with non-designated materials. However, past that point, requirements are based on overall volume of certified or designated material claimed along a supply chain, rather than the establishing a chain of custody for any specific physical batch of goods, so these schemes are typically not able to provide chain of custody information for physical goods to downstream companies.
Provides information on location and identities of entities along supply chainIn some cases. Information on participating supply chain entities will be collected to some degree – depending on the point in the supply chain where it becomes permissible to mix certified/otherwise designated materials with non-designated materials. However, past that point, requirements are based on overall volume of certified or designated material claimed along a supply chain, rather than the establishing a chain of custody for any specific physical batch of goods, so these schemes likely will not be set up to provide reliable information on supply chain entities to downstream companies.
Provides information on sourcing relationships between entities along supply chain such as indirect suppliers and facilities management groupsNo
Provides information on volume of certified or assessed sustainable product supported by purchaseYes
Supports collection of information about labor conditions, or access to / reflection of the voices, experiences, and needs of workers in the supply chainIn some cases – depending on the presence and strength of the associated certification or other voluntary sustainability scheme. When used alongside a credible certification or voluntary sustainability scheme with strong labor rights standards and a mechanism for accessing and reflecting the voices, experiences, and needs of workers, mass balance product tracking can act to provide assurances regarding working conditions at worksites contributing a given volume of designated material to the supply chain. On the other hand, some forms of the mass balance product tracking method will not collect any information on working conditions. Many models of bulk commodity product tracking will be somewhere along this spectrum –for example, by offering assurances that supply chain entities have systems to address labor rights, but not directly surfacing credible information on actual working conditions in practice.
Decreases market for unethical goods and increase market for goods produced with less FL/CL risk; Provides structure to drive increased value to producers and suppliers with demonstrated commitment to labor and human rights due diligence In some cases. It is helpful to note that because mass balance methods are typically not as intensive as full identity preservation methods, they may be more feasible to implement for a broader range of producers and suppliers.
Facilitates increased engagement with supply chain actors Yes. It is helpful to note that because mass balance methods are typically not as intensive as full identity preservation methods, they may be more feasible to implement for a broader range of producers and suppliers. At the same time, downstream suppliers such as processors and manufacturers need at least moderate levels of administrative capacity to maintain certified/designated volume documentation requirements.

Mass Balance Product Tracking & Labor Due Diligence

How can mass balance help combat forced labor and child labor in supply chains?

Examples of Mass Balance

What are some examples of Mass Balance Product Tracking that could be used to combat forced labor and child labor in action?

Operationalizing Mass Balance Product Tracking

What supply chain characteristics would support the use of mass balance product tracking?

  • Supply chains where maintaining physical segregation of the material product is challenging, such as in agricultural commodities.
  • Complex supply chains with large numbers of producers, processors, and manufacturers.
  • Downstream suppliers such as processors and manufacturers with at least moderate levels of administrative sophistication to maintain certified volume documentation requirements.
  • Where the consumer or regulatory demand does not necessitate claims linked to the origin or transit points of a physical consumer product.
  • Where potential labor rights abuses at the point of material origin are relatively well-understood and are not extremely severe.
  • Where potential labor rights abuses are of heightened concern at downstream level suppliers (processor and producer), as documentation of these supplier identities is likely to be more robust.

Mass Balance Product Tracking & Supporting Technologies

What tools and technologies can support mass balance product tracking?

Functionality NeededPotential Facilitating Technology Types
Identify certified or other designated product as distinct from other product, even when product is mixedAdditive Tracers
Means of verifying volume certified and tradedDigital Chain of Custody Platform (in some cases)
Documenting transactions throughout length of supply chain, including points of aggregation or transformation, if relevantTransaction ledgers (e.g., blockchain)
Digital Chain of Custody Platform (in some cases)

Product Tracking Method: Certificate Trading

Certificate Trading: The Basics

Certificate trading (also known under the proprietary system name “Book and Claim”4ISEAL Guidance: Chain of custody models and definitions. ISEAL, 2016, www.isealalliance.org/sites/default/files/resource/2017-11/ISEAL_Chain_of_Custody_Models_Guidance_September_2016.pdf) is the only Product Tracking traceability method that does not establish or document a Chain of Custody for physical possession of the target goods at any level in the supply chain. Claims are completely decoupled from the physical good moving through the supply chain. Instead, producers who are certified or otherwise designated under a scheme can sell their product freely on the open market but obtain certificates for the volume of certified material produced. These certificates can be purchased by companies on digital trading platforms, providing financial incentives for sustainable production to the original producer and allowing the purchaser to demonstrate financial support of that volume of sustainable production. There is no link to the physical product as transactions of the certified product are not documented past the point where a virtual certificate or credit is generated based on the volume produced.

In some cases, certificate trading allows certificate purchasers to make a direct trade from a certificate seller, allowing purchasers to support producers they choose.5ChainPoint RTRS Trading Platform. ChainPoint: Connecting Supply Chains,, www.chainpoint.com/our-customers/rtrs-sustainable-soy-supply-chain/ Even in those cases, however, there is still no link between the producer and the final product.

Certificate tracing approaches can still support labor rights due diligence. If the relevant certification or other voluntary sustainability program includes a robust labor rights due diligence component – including requirements for compliance with core labor rights standards and mechanisms to access or reflect the voices, experiences, and needs of workers – purchasing certificates allows a downstream company to financially support producers with more ethical practices and to demonstrate that support to external stakeholders. However, certificate trading approaches typically do not provide any information on a company’s actual upstream supply chain and therefore cannot be easily harnessed to support upstream due diligence steps such as engaging with the supply chain or assessing and addressing risks in a company’s supply chain. Because claims are de-coupled from any actual product or volume of product in a company’s supply chain, they only allow a company to make claims about their financial support for sustainable production. They do not allow companies to make claims or offer assurances about any specific good or batch of goods, and therefore, are not likely to be sufficient to meet regulatory and legal expectations in supply chains with heightened risk.

Despite these limitations, certificate trading methods might be considered in contexts where other product tracking approaches are not feasible. The “Operationalizing Certificate Trading in the Supply Chain” section discusses supply chain contexts where certificate trading may be a feasible and reasonable approach to traceability for labor rights due diligence.

Potential Benefits of Using Certificate Trading for Downstream Users

BenefitsApplicable?
Provides information on origin of good or material in actual physical good No
Provides information on geographic locations of transit points of actual good along supply chain No
Provide information on transactions between entities along supply chain tied to specific good/batch of goods (Chain of Custody)No
Provides information on location and identities of entities along supply chainNo
Provide information on sourcing relationships between entities along supply chain such as indirect suppliers and facilities management groupsNo
Provides information on volume of certified or assessed sustainable product supported by purchaseYes
Supports collection of information about labor conditions, or access to / reflection of the voices, experiences, and needs of workers in the supply chainIn some cases. Depending on the presence and strength of the associated certification scheme or other voluntary sustainability scheme, certificate trading may allow downstream companies to make some indirect claims: namely, that a certain volume of their purchases of a given good supports production from worksites that meet specified standards.
Decreases market for unethical goods and increases market for goods produced with less FL/CL risk Yes
Provides structure to drive increased value to producers and suppliers with demonstrated commitment to labor and human rights due diligenceYes
Facilitates increased engagement with supply chain actors No

Certificate Trading & Labor Due Diligence

How Can Certificate Trading Help Combat Forced Labor and Child Labor in Supply Chains?

Examples of Certificate Trading

What are some examples of Certificate Trading that could be used to combat forced labor and child labor in action?

Operationalizing Certificate Trading in the Supply Chain

What supply chain characteristics would support the use of bulk commodity product tracking?

  • Supply chain contexts where downstream companies are earlier in their traceability and due diligence journeys but want to take shorter term steps to support socially responsible production as they develop and implement a longer-term strategy.
  • Supply chains where maintaining physical segregation of the material product is challenging, such as in agricultural commodities.
  • Complex supply chains with large numbers of producers, processors, and manufacturers.
  • Where upstream suppliers such as processors and manufacturers lack the administrative capacity to maintain segregation or implement other components of traceability schemes.
  • Where the consumer or regulatory demand does not necessitate claims linked to the origin or transit points of a physical consumer product.
  • Where potential labor rights abuses at the point of material origin are relatively well-understood and are not extremely severe.
  • Where labor rights concerns in the lifespan of a certain good or material are limited to the production of raw materials – or, where a company has other robust measures to address labor rights risks in more downstream supply chain nodes.

Certificate Trading & Supporting Technologies

What tools and technologies can support certificate trading?

Functionality NeededPotential Facilitating Technology Types
Means of registering and trading certificatesTrading platform
Means of verifying volume certified and tradedDigital Chain of Custody Platform (in some cases)
  • 1
    “The certified products are mixed but the documentation may retain specific origin information to denote the origin from a specific region or country in the claim.” ISEAL Guidance: Chain of custody models and definitions. ISEAL, 2016, www.isealalliance.org/sites/default/files/resource/2017-11/ISEAL_Chain_of_Custody_Models_Guidance_September_2016.pdf.
  • 2
    Note there are multiple widely used parameters for different types of Mass Balance. ISEAL provides definitions for: Group, Site, and Batch-level mass balance, as well as alternative names for Group: “multi-site;” alternative names for Site: “controlled blending” and “factory gate mass balance;” alternative names for Batch: “percentage blending and batch blending.” Source: ISEAL Guidance: Chain of custody models and definitions. ISEAL, 2016, www.isealalliance.org/sites/default/files/resource/2017-11/ISEAL_Chain_of_Custody_Models_Guidance_September_2016.pdf. ISO provides a definition that does not break out various levels of the mass balance approach, and instead describes a chain of custody model in which “materials or products with a set of specified characteristics are mixed according to defined criteria with materials or products without that set of characteristics.” Source: ISO 22095:2020(en) Chain of custody — General terminology and models. ISO, 2020, www.iso.org/obp/ui/#iso:std:iso:22095:ed-1:v1:en.
  • 3
    ISEAL Guidance: Chain of custody models and definitions. ISEAL, 2016, www.isealalliance.org/sites/default/files/resource/2017-11/ISEAL_Chain_of_Custody_Models_Guidance_September_2016.pdf.
  • 4
    ISEAL Guidance: Chain of custody models and definitions. ISEAL, 2016, www.isealalliance.org/sites/default/files/resource/2017-11/ISEAL_Chain_of_Custody_Models_Guidance_September_2016.pdf
  • 5
    ChainPoint RTRS Trading Platform. ChainPoint: Connecting Supply Chains,, www.chainpoint.com/our-customers/rtrs-sustainable-soy-supply-chain/