C2PA onchain is a project to bridge that implements verification of C2PA claims onchain. The onchain representation implements the following.

• A bridge / hardcoding of the major C2PA CA roots
• A C2PA fact registry which verifies C2PA Content Credentials
• A crypo native CA issuance mechanism

Reality Registry as a crypto native implementation of C2PA

• Onchain representation of C2PA content credentials Signer
• CA list onchain

https://c2pa.org/specifications/specifications/1.4/explainer/Explainer.html

An onchain decoupled manifest service.