Marking AI-generated content

Machine-readable: Embed a signed C2PA manifest with a c2pa.created action and IPTC digitalSourceType=trainedAlgorithmicMedia. This is machine-readable and travels with the file.

Disclosure: Also show a visible AI-generated label near the image for human viewers.

Tool: legalithm mark <image>

Machine-readable: Embed a C2PA manifest in the video container (MP4/MOV), same created action and source type as images. Re-encoding can strip it, so mark the final rendered asset.

Disclosure: Show a persistent visible label; for realistic (deepfake) footage the disclosure obligation is stricter.

Machine-readable: Embed a C2PA manifest where the audio format supports it. Coverage across audio codecs is less mature than for images, so pair it with a disclosure.

Disclosure: Announce AI generation audibly or in the surrounding context (player, transcript, description).

Machine-readable: There is no widely adopted embedded provenance standard for plain text, and statistical watermarking is not yet reliable or standardized. Do not rely on an invisible mark.

Disclosure: Use an explicit, visible disclosure: an AI-generated label on the content, or a chatbot notice for conversational output (Legalithm generates both). For documents, add provenance in the file metadata.