Topics · Domain workflow

Content and media provenance

A verifier can check whether content still matches the signed proof path after it leaves the original publishing surface.

Problem

What breaks today

An image is shared, downloaded, re-uploaded, and screenshot. Metadata is gone. A reviewer needs to know whether the visible image still matches the version that was originally signed.

Mechanism

How ZK-SNAP responds

Receipts bind fingerprints, transformation trails, public claims, and optional anchors without making platform logs the source of truth.

Verifiable outcome

What a verifier can check

A verifier can check whether content still matches the signed proof path after it leaves the original publishing surface.

Related profiles and labels

ZK-SNAP receiptC2PA-compatibleSigils

Go deeper

Try the workflow, then read the spec.

Use Cases tells the story with cards. Proof Lab runs create and verify locally. Protocol holds the normative reference.