The signed container
Holds the claim and assertions associated with the asset.
What is C2PA?
C2PA is an open technical standard for attaching tamper-evident provenance information to digital media. Content Credentials are a way people can inspect that signed evidence.
- C2PA helps answer questions about origin and declared history. It is not a universal detector for truth, falsity or AI generation.
Signed evidence travels with the media
A Content Credential combines structured declarations with cryptographic validation.
The declared information
Can describe actions, ingredients, software and other provenance context.
The integrity mechanism
Binds the signed claim so changes can be detected during validation.
The signer context
Connects the signature to an identity and a trust-chain evaluation.
From creation to verification
The standard supports a chain of signed declarations rather than one permanent truth label.
- 01Create or edit
A compatible tool produces or transforms an asset.
- 02Declare
The tool records available provenance assertions.
- 03Sign
A certificate and private key sign the claim.
- 04Verify
A validator checks integrity, signature and trust context.
C2PA is different from detection
Provenance evidence and content classifiers can complement each other, but they measure different things.
Verifies available evidence
- Is a signed claim present?
- Does it still match the asset?
- What history was declared?
- How is the signer evaluated?
Detection estimates content properties
- Does a model classify the content as synthetic?
- How confident is that probabilistic estimate?
- Could processing affect the score?
- What false-positive rate applies?
Valid provenance does not guarantee factual truth
A credential can show that an identified signer made a declaration and that the signed evidence validates. Reviewers still need editorial, legal or domain-specific methods to assess the underlying claims.
Verify any file.
The ProvSeal extension reads the Content Credentials of an image, a video or a PDF right in your browser. No file is uploaded.