American Carbon Registry (ACR)
ACR, operated by Winrock, was the first registry to receive ICVCM Core Carbon Principles program-level approval, and it has migrated 25-plus years of issuance data onto ICE GreenTrace, which exposes developer APIs that make issuance state addressable to dMRV providers.
American Carbon Registry (ACR)Inside American Carbon Registry (ACR)
ACR was the first registry to receive ICVCM CCP program-level approval and the first with a Paris-aligned methodology designated, anchoring its integrity-incumbent positioning.
In June 2026 ICE launched GreenTrace and ACR migrated 437 million serialized credits and over 40,000 files from more than a thousand projects, preserving 25-plus years of data through the transition.
GreenTrace brings real-time issuance and retirement updates, developer APIs exposing issuance data to marketplaces and ratings providers, an enterprise audit trail, and an atomic settlement layer.
How Straatos integrates American Carbon Registry (ACR)
A host registry whose GreenTrace migration turns it into a genuinely API-addressable integration target for a dMRV system of record.
Read issuance via GreenTrace
Connect to the GreenTrace developer APIs to pull ACR issuance, transfer and retirement events down to the serial-number level.
Feed the audit trail
Supply Straatos MRV and verification documents into the enterprise audit trail that links monitoring evidence to credits.
Align to CCP
Design Straatos evidence outputs toward ICVCM Core Carbon Principles so projects routed to ACR clear the CCP bar.
Recent developments
- 2026ACR migrated to ICE GreenTrace, launched 22 June 2026, transferring 437 million serialized credits with real-time updates and developer APIs.
- 2025Confirmed as the first ICVCM CCP-approved registry, with four ACR methodologies carrying the CCP label.
Run American Carbon Registry (ACR) inside Straatos
See how a project running on Straatos puts American Carbon Registry (ACR) to work alongside every other source: field, satellite and community.