The Nature Capital Carbon Registry is validated by RINA in accordance with ISO 14068 and VCMI guidelines.

The Registry is for solutions with measurable environmental benefits including CO₂e sequestration, avoided greenhouse gas emissions and biodiversity conservation. The registry is not intended for projects that fail to meet carbon credit requirements or have harmful practices, such as monocultures, which can damage local biodiversity.

Projects' eligibility criteria include ISO 14064-2:2019 Validation, Verification by third-party, and demonstration of long-term project benefits. Projects must commit to site protection for at least 10 years. These standards are in place for the projects to contribute meaningfully to carbon reduction, ecosystem conservation and restoration, and sustainable management practices.

Programmes and projects must be validated by third-party bodies, which shall themselves be accredited to ISO/IEC 17029, ISO 14065, ISO 14064-3 standards.