Category: Eywa Explains
Abstract / Executive Summary
National carbon registries are becoming essential components of the digital infrastructure used to administer carbon markets, track mitigation outcomes and support international climate cooperation. Yet a functioning registry does not automatically guarantee credible carbon credits. Trust depends on the quality of the underlying evidence, the rules governing transactions and the institutions responsible for maintaining accurate, accountable records.
This article examines the technical, institutional and environmental conditions required for a trustworthy national carbon registry. Drawing on the Paris Agreement’s Article 6 framework, the Integrity Council for the Voluntary Carbon Market’s Core Carbon Principles and the World Bank’s carbon-pricing research, it considers data integrity, measurement, reporting and verification (MRV), transparency, double-counting prevention, cybersecurity and institutional ownership.
The analysis argues that registry credibility rests on three connected foundations: reliable evidence of mitigation outcomes, traceable and correctly governed transactions, and accountable institutions capable of operating the system over time. Technology can strengthen these foundations, but cannot independently prove that emissions reductions are real, additional or permanent.
Documented experience from Eywa Systems’ work on Papua New Guinea’s National Carbon Registry and REDD+ Safeguards Information System illustrates how public-facing information, institutional coordination, technical controls and capacity development fit into national digital infrastructure delivery. This company-reported experience is treated as an implementation example, not independent proof of registry effectiveness.
The article concludes that governments should evaluate registries as long-term public infrastructure rather than isolated software products. Trust must be supported by verifiable data, transparent procedures, proportionate security controls, independent oversight and sustainable institutional capacity.
Keywords
National carbon registry; carbon markets; measurement, reporting and verification; Article 6; carbon-credit integrity; digital governance; transparency; climate finance.
Main article
1. Introduction
Carbon markets depend on the ability to identify, quantify and track greenhouse gas (GHG) emissions reductions or removals. As governments develop domestic carbon-market arrangements and participate in international cooperation, they need reliable systems for recording mitigation outcomes, administering transactions and reporting relevant information.
The scale of this task is growing. The World Bank’s State and Trends of Carbon Pricing 2026 reports that direct carbon pricing covered just over 29% of global GHG emissions and that 87 carbon-pricing policies had been implemented worldwide (World Bank, 2026). These figures describe direct carbon pricing, including emissions trading systems and carbon taxes; they should not be interpreted as the proportion of emissions covered by national carbon registries.
A national carbon registry provides the record-keeping infrastructure for defined carbon-market activities. Depending on its mandate, it may record registered activities, issued units, account holders, transfers, cancellations and retirements. It can also support public reporting and connections with other national or international systems.
However, a registry’s ability to record a transaction does not establish the environmental validity of the credit involved. A technically reliable system can preserve inaccurate measurements just as effectively as accurate ones. Equally, sound carbon-accounting rules can be undermined by weak access controls, incomplete records or unclear institutional responsibilities.
The central question is therefore not simply whether a registry works, but whether its records, rules and governance arrangements can be independently scrutinised and trusted.
This article examines that question through international carbon-market guidance and documented implementation experience relevant to national environmental information systems. Its central argument is that a trustworthy registry requires trustworthy evidence, credible MRV and accountable governance, supported by technology designed to make decisions and transactions traceable.
2. Conceptual / Theoretical Background
2.1 What does a national carbon registry actually establish?
The United Nations Framework Convention on Climate Change (UNFCCC) describes its Article 6.4 mechanism registry as a system for tracking mitigation outcomes, assigning unique identifiers and recording ownership and use (UNFCCC, n.d.). These functions establish a traceable record within the applicable mechanism’s rules.
Three forms of integrity must be distinguished.
Registry integrity concerns the accuracy, consistency, security and traceability of records, together with compliance with authorised transaction procedures.
Environmental integrity concerns whether claimed emissions reductions or removals are credible, appropriately quantified and consistent with the applicable crediting requirements. Relevant considerations include additionality, permanence and the quality of measurement and verification.
Institutional integrity concerns whether the responsible authorities apply rules consistently, manage conflicts of interest, protect information appropriately and remain accountable for their decisions.
These dimensions reinforce one another, but none substitutes for the others. A registry may provide an unbroken transaction history without establishing whether a forest project genuinely prevented deforestation. That determination depends on evidence, methodologies, monitoring and verification beyond the transaction record itself.
2.2 MRV and the evidence behind carbon credits
Measurement, reporting and verification, commonly abbreviated as MRV, provides the evidential foundation for many carbon-market activities. Measurement estimates emissions or removals; reporting documents the methods and results; verification provides an independent assessment against applicable requirements.
The Integrity Council for the Voluntary Carbon Market (ICVCM) incorporates robust quantification, independent third-party verification, tracking, transparency and the prevention of double counting into its Core Carbon Principles (ICVCM, 2024).
These principles provide a useful reference for understanding carbon-credit integrity. They are not, however, a universal certification standard for national registry software. A registry’s requirements must be derived from its legal mandate, the crediting arrangements it supports and the relevant national and international rules.
3. Literature and Evidence Review
International carbon-market frameworks increasingly connect trustworthy records with transparent governance and credible mitigation evidence. The Paris Agreement’s Article 6 framework distinguishes between cooperative approaches under Article 6.2 and the mechanism established under Article 6.4. Each has specific accounting, reporting and operational requirements.
The UNFCCC maintains formal procedures for the Article 6.4 mechanism registry. Its current published registry procedure, version 3.0, entered into force on 30 July 2026, illustrating that registry rules and administrative arrangements require ongoing maintenance rather than one-off design (UNFCCC, 2026).
The ICVCM’s Core Carbon Principles provide a complementary perspective by addressing the integrity of carbon-crediting programmes and credit categories. Their requirements cover governance, tracking, transparency, independent validation and verification, robust quantification, avoidance of double counting, permanence and safeguards (ICVCM, 2024).
The World Bank’s analysis of international carbon markets also highlights the importance of consistent standards and interoperable infrastructure as carbon markets develop across jurisdictions (World Bank, 2024).
Taken together, these sources support a clear conclusion: registry credibility depends on the relationship between technical records, accounting rules, underlying mitigation evidence and institutional oversight. They do not establish that a single software architecture or technology will guarantee trustworthy outcomes in every country.
4. Analysis and Discussion
4.1 Clear governance and legal authority
A trustworthy registry needs an explicit institutional mandate. Governments should define which authorities can register activities, approve methodologies, authorise transfers, issue or cancel units, oversee verification and resolve disputes.
These responsibilities must be reflected in applicable laws, regulations and administrative procedures, not merely encoded in software.
The distinction between technical administration and regulatory authority is especially important. A technology provider may implement account permissions, approval workflows and transaction controls. It should not independently decide whether a mitigation activity qualifies for credit issuance or whether an international transfer is authorised.
Good governance also requires documented procedures for correcting errors, suspending accounts, investigating suspected misconduct and handling appeals. Material changes to records and permissions should leave a traceable history.
Trust grows when users can identify who made a decision, which rules applied and how an affected party can challenge an error.
4.2 Reliable data and end-to-end traceability
Every unit recorded by a registry should have a unique identifier and an unambiguous status. Depending on the applicable system, its record may include the issuing authority, associated activity, quantity, methodology, monitoring period, ownership and transaction history.
Validation rules should prevent inconsistent or unauthorised operations. For example, the system should reject a transfer that exceeds an account’s available balance or attempts to transfer a unit that has already been retired. Where corrections are necessary, the registry should preserve an auditable record of the change rather than silently overwrite the original entry.
These controls help address double counting, which can occur through double issuance, double use or double claiming (ICVCM, 2024).
Yet transaction traceability is not equivalent to environmental verification. A perfectly maintained record may still refer to a credit derived from an unreliable baseline or an overstated estimate of emissions reductions. Registry controls must therefore complement, rather than replace, robust MRV arrangements.
4.3 Transparency that enables meaningful scrutiny
A national registry should make relevant information accessible through a clear public interface. Subject to applicable disclosure rules, this may include registered activities, project locations, methodologies, issuance volumes, credit vintages, transaction status and retirement records.
Transparency is useful only when the information is understandable, sufficiently complete and updated in a timely manner. A public dashboard should explain what its figures represent, which reporting period they cover and which methodology or reference level underpins them.
For example, a dashboard showing national emissions against a forest reference level does not, by itself, demonstrate that the difference represents independently verified, tradable carbon credits. The distinction between national emissions accounting, measured mitigation outcomes and issued units must remain clear.
The ICVCM explicitly emphasises the availability of comprehensive information in electronic form and accessibility to non-specialist audiences (ICVCM, 2024). This supports scrutiny by government agencies, market participants, researchers and civil society.
Transparency does not require unrestricted publication of personal data, commercially sensitive information or security-critical details. A credible system needs defined disclosure rules, proportionate access controls and documented procedures for correcting published information.
4.4 Preventing double counting and enabling interoperability
Double counting undermines the credibility of carbon-market claims because a single mitigation outcome may be represented as multiple credits or counted more than once towards mitigation targets.
A registry can reduce this risk through unique identifiers, transaction validation, account controls, reconciliation procedures and clear rules for issuance, transfer, cancellation and retirement.
International cooperation introduces additional complexity. Under Article 6, participating countries must apply the relevant authorisation, reporting and accounting requirements. Corresponding adjustments are accounting adjustments used in applicable circumstances to avoid the same authorised mitigation outcome being counted towards multiple climate targets.
A national registry must therefore be designed around the rules governing the transactions it supports. Interoperability—the ability of systems to exchange and interpret information consistently—requires agreed data definitions, identifiers, interfaces and procedures for resolving discrepancies.
Connecting systems does not automatically make their records consistent. Integrations need authentication, permission controls, error handling and reconciliation. Where records conflict, the responsible authorities must have a documented way to investigate and resolve the difference.
4.5 Cybersecurity and operational resilience
A registry may support transactions with financial implications and records relevant to national climate commitments. Unauthorised changes, compromised accounts or prolonged outages can therefore damage confidence in the system.
Security should be built into the architecture through appropriate authentication, role-based access, encryption, protected backups, secure configuration, vulnerability management and monitoring of suspicious activity. Privileged operations should be restricted and logged.
Audit trails should capture who performed a material action, when it occurred and what changed. Logs need protection against unauthorised alteration, alongside appropriate retention and review procedures.
Operational resilience matters just as much. Governments should define incident-response arrangements, recovery procedures, maintenance responsibilities and realistic service-continuity requirements. In low-connectivity environments, system design must reflect actual operating conditions without weakening transaction integrity.
No single control guarantees security. A registry needs regular testing, competent administration, timely updates and clear accountability when incidents occur.
4.6 Institutional ownership and long-term sustainability
A registry must remain usable after its initial implementation project ends. This requires trained administrators, documented procedures, secure infrastructure, predictable maintenance funding and clear responsibility for ongoing operations.
Procurement arrangements should clarify ownership and access to data, source code, documentation and interfaces, as well as responsibilities for upgrades, technical support and eventual transition to another provider.
Open-source technologies can reduce dependence on proprietary licences and facilitate adaptation. They do not, on their own, guarantee sustainability: institutions still need staff, funding, security management and technical expertise.
The appropriate architecture depends on national requirements, resources and institutional capacity. Governments may develop their own systems, procure external services or use international infrastructure. The critical test is whether the chosen arrangement supports the required functions and can be maintained throughout its intended operational life.
4.7 What Eywa Systems’ implementation experience illustrates
Eywa Systems’ October 2026 company profile documents its work on Papua New Guinea’s National Carbon Registry and REDD+ Safeguards Information System under the EU-funded EU-FCCB Digital Transformation Programme, implemented with Expertise France. The profile reports that Phase 1 was completed, the systems were in production, public platforms were live and more than 190 training participations had been delivered across six participating government agencies (Eywa Systems, 2026).
The profile also describes the National Carbon Registry’s public emissions dashboard, which presents national emissions against the forest reference level alongside public methodology notes.
This example is relevant because it brings together several requirements discussed above. Public-facing information supports scrutiny; methodology notes help explain the basis of reported figures; and training and coordination across government agencies support operational use. These are practical elements of national digital infrastructure, not merely software features.
Eywa’s wider documented delivery approach also includes role-based access, audit trails, testing, documentation and institutional handover. Such capabilities are relevant to registry design because they can help translate governance requirements into operational controls. Whether particular controls are sufficient, however, must be established through system-specific testing and independent assessment.
The available company profile is not an independent evaluation of the National Carbon Registry. It does not, by itself, prove that all underlying emissions data have been independently validated, that double counting has been eliminated or that the platform has increased market confidence. Those claims would require additional evidence, including independent audits, transaction assessments and user or institutional evaluations.
The defensible lesson is narrower but valuable: implementing national registry infrastructure involves connecting technical systems with public information, institutional responsibilities and the capacity to operate them over time.
4.8 Technology should follow the trust requirements
Blockchain and artificial intelligence may offer useful capabilities for particular registry functions, such as tamper-evident records or identifying unusual transaction patterns. Their value should be assessed against a defined operational need, not assumed from the technology itself.
Blockchain cannot independently establish that a claimed forest-carbon benefit occurred. AI-generated alerts cannot replace competent investigation, and automated approval cannot substitute for lawful authority.
A proportionate design starts with requirements, risks and acceptance criteria. Governments should select technology that makes the required records more reliable, decisions more traceable and operations more maintainable without introducing unnecessary complexity.
5. Challenges, Limitations, and Counterarguments
Three limitations deserve particular attention.
First, a registry cannot compensate for weak carbon accounting. If the underlying baseline, monitoring data or verification process is unreliable, accurate transaction records will not repair the environmental claim.
Second, transparency involves legitimate trade-offs. Public accountability must be balanced against privacy, confidentiality and security. Clear disclosure categories are preferable to either blanket secrecy or unrestricted access.
Third, national circumstances differ. Countries vary in institutional capacity, connectivity, legal arrangements and carbon-market maturity. A system designed for a mature emissions trading scheme may be unnecessarily complex for a country initially tracking a narrower set of mitigation outcomes.
International standards can establish common principles, but they cannot remove the need for country-specific legal, operational and technical decisions. Similarly, the experience of one registry cannot establish that the same architecture will deliver equivalent results elsewhere.
6. Implications
Governments should assess registry trustworthiness through measurable requirements rather than vendor claims or the sophistication of the technology.
A practical approach has five elements:
- Define authority and accountability. Establish clear legal responsibilities for registration, issuance, transfers, verification, correction and dispute resolution.
- Translate rules into testable controls. Specify unique identifiers, validation rules, transaction histories, account permissions and reconciliation procedures.
- Make relevant information accessible. Publish records and methodologies in forms that enable meaningful scrutiny, subject to legitimate disclosure restrictions.
- Fund security and continuity. Establish testing, maintenance, backup, recovery and incident-response arrangements for the full operational lifecycle.
- Evaluate outcomes independently. Assess record completeness, unresolved discrepancies, security incidents, recovery performance and user access to information. These indicators should be defined against agreed baselines and should not be mistaken for direct measures of environmental integrity.
For technology providers, the implication is equally clear. Delivering a credible registry requires more than deploying software. Requirements, governance, testing, documentation, training and institutional handover must be treated as connected parts of implementation.
7. Conclusion
A trustworthy national carbon registry combines reliable data, traceable transactions, transparent governance, appropriate cybersecurity and sustainable institutional ownership. Its purpose is to make carbon-market records verifiable and transactions accountable within a clearly defined regulatory framework.
International guidance from the UNFCCC and ICVCM reinforces the importance of unique identification, independent verification, transparent information and safeguards against double counting. Eywa Systems’ documented work on Papua New Guinea’s National Carbon Registry illustrates how public reporting, institutional coordination and capacity development form part of national system delivery, while not independently proving the effectiveness of every registry control.
The central distinction remains decisive: a registry records and tracks; MRV and independent verification establish whether the underlying mitigation claim meets the applicable requirements. Neither technology nor institutional reputation can substitute for credible evidence.
Trust is therefore not a feature that can simply be switched on at launch. It must be sustained through verifiable records, accountable decisions, independent scrutiny and institutions capable of maintaining the system over time.
References
- Integrity Council for the Voluntary Carbon Market. (2024). Core carbon principles: Assessment framework and assessment procedure. https://icvcm.org/core-carbon-principles/
- United Nations Framework Convention on Climate Change. (2026). Procedure: Article 6.4 mechanism registry (Version 3.0). https://unfccc.int/documents/645827
- United Nations Framework Convention on Climate Change. (n.d.). Registry. https://unfccc.int/process-and-meetings/the-paris-agreement/article-6/article-64-pacm/registry
- World Bank. (2024). State and trends of carbon pricing: International carbon markets 2024. World Bank.
- World Bank. (2026). State and trends of carbon pricing 2026. https://doi.org/10.1596/978-1-4648-2348-0