C2PA and Content Credentials Explainer
The Coalition for Content Provenance and Authenticity’s own plain-language companion to its technical specification for Content Credentials — a cryptographically signed, tamper-evident record of a digital asset’s origin and edit history, covering how that record behaves for an end user.
License: CC BY 4.0 — https://creativecommons.org/licenses/by/4.0/
Key points
- A Content Credential (manifest) records what was done to an asset, by whom, and its ingredients — the sources that fed into it; an “input” ingredient specifically covers the prompt given to a generative AI system. See AI Content Marking.
- A hard binding cryptographically ties the manifest to the asset’s exact bytes, so any edit — even one pixel — invalidates it. See AI Content Marking.
- A soft binding (an invisible watermark or a content fingerprint) trades that precision for durability, letting a manifest survive the kind of re-encoding a social media platform applies automatically, and be recovered from a separate manifest store even after the platform strips it from the file. See AI Content Marking.
- Fingerprint-based recovery is approximate, not exact — the specification recommends presenting a fingerprint-matched credential to the user for manual review rather than treating the match as certain. See AI Content Marking.