Regen Registry describes ecological crediting and project records; Toucan documents a bridge and retirement workflow for eligible carbon credits; Open Forest Protocol describes forest project monitoring and credit issuance. They address different stages of the credit lifecycle and may not be substitutes for one another.
Three different points in the credit lifecycle
A project developer needs a credible method for measuring environmental outcomes. A buyer needs to understand the credit, its history and whether it has been retired. A software team may need to bring an eligible credit into an onchain application. Those are connected problems, but they are not the same purchase.
This guide compares public documentation reviewed on November 2, 2026. We have not audited the providers, tested their software or verified individual environmental claims. Inclusion in a directory is not a recommendation or assurance of credit quality.
| Question | Regen Network | Toucan | Open Forest Protocol |
|---|---|---|---|
| Documented focus | Ecological project registry and crediting protocols | Bridging eligible credits and retirement workflows | Forest project registration, monitoring and verification |
| Example evidence | Registry describes crediting protocols and project records | Puro bridge documentation describes tokenization and detokenization of eligible CORCs | Project-developer guide describes monitoring and verification before issuance |
| Ask before proceeding | Which methodology, verifier and credit type applies to the project? | Is the specific credit eligible, and how is its registry status reconciled? | Which project, country and methodology can be accepted? |
| Do not assume | Registry inclusion proves a project's claims | A token can be redeemed or retired independently of registry rules | Forest monitoring alone establishes a complete buyer's claim |
Sources: Regen Registry, Regen crediting protocols, Toucan Puro carbon bridge, Toucan retirements and Open Forest Protocol project developers.
Regen: project and crediting records
Regen describes an ecological projects and data registry and publishes crediting protocols that set rules for project registration and credit issuance. Buyers should inspect the particular protocol and project documentation rather than assume all ecological credits have the same characteristics.
Ask for the project boundary, baseline, monitoring period, verifier, issuance and retirement records. Establish how changes or corrections are recorded and what export or API access is available for your application. A public project record is a starting point for diligence, not an independent assessment of the resulting environmental outcome.
Toucan: eligible credits across registry and blockchain
Toucan's open-source transition FAQ describes a May 2025 strategic change. It says the Puro bridge remains operational, but notes that BCT contract administration moved to KlimaDAO in 2024. Buyers should establish who maintains the exact contracts, interface and support they intend to use; the existence of documentation is not a service commitment.
Toucan documents a Puro carbon bridge for tokenizing, detokenizing and retiring eligible Puro.earth carbon removal certificates. Its documentation states that tokenization requires access to a Puro.earth account and CORCs held in the Puro Registry, alongside a compatible wallet. Check current supported networks and commercial access directly before building.
The retirement documentation says a retirement request can remain pending until finalized in the underlying registry. This distinction matters for reporting: an onchain request and a finalized registry retirement should not be presented as the same event. Ask how identifiers are mapped between systems, how duplicate claims are prevented, and what evidence a buyer receives after finalization.
Open Forest Protocol: monitoring forest projects
Open Forest Protocol describes a process that starts with organization and project registration, followed by ground monitoring, verification and potential credit issuance. Its public guide describes an Atlas for displaying project information. Confirm current methodology, verifier arrangements and local eligibility before relying on the process for a specific project.
Ask who collects measurements, how plots are selected, whether measurements are independently checked, and how permanence, reversals and disputes are handled. Also request the actual project records and credit documentation; a description of the platform is not proof that a particular forest project has delivered its claimed results.
A practical diligence checklist
- Identify the project, methodology, credit vintage and relevant registry before discussing tokens.
- Obtain the monitoring and verification documents and check who performed the work.
- Trace the specific credit identifier through issuance, transfer and retirement records.
- Ask whether a bridge locks, cancels or otherwise controls the underlying registry record, and who can reverse the process.
- Establish whether retirement is pending or final, and what the buyer can substantiate in its own reporting.
- Review permanence, reversal risk, double counting and methodology-specific uncertainties with an appropriate specialist.
- Confirm pricing, access, technical support and the process for correcting erroneous data in writing.
The climate and MRV directory provides more starting points. For practical context, see our carbon credit monitoring use case.
FAQ
Does an onchain record prove a carbon credit is high quality?
No. A record can help trace transactions, but the methodology, monitoring, verification and underlying claims still need independent review.
Can every carbon credit be bridged through Toucan?
Do not assume so. Toucan's documented Puro bridge has specific account, credit and network requirements. Confirm current eligibility with the registry and provider.
Are these three direct substitutes?
Not necessarily. They describe registry, monitoring and bridging functions that can occur at different stages of a carbon credit lifecycle.
Evaluating climate infrastructure?
Tell us about your project, methodology and intended workflow, or email contact@fluidrwa.com.