Live demo

Sign a real file. See every signal.

Drop an image, audio, or video. We attach a C2PA manifest, embed an invisible watermark, anchor it to Bitcoin/OTS and Arbitrum, then hand you back the signed file so you can verify the round-trip yourself.

Drop a file to sign

Image · up to 20 MB · no account, no key

Audio (AudioSeal) and video (VideoSeal) — available on request.

PNGJPEGWebP

Demo limits: 5 sign requests + 5 verify requests per hour per IP · 20 MB per file · files are stored on the public demo tenant and may be deleted at any time. This page shows provenance signals and integrity relationships — not truth or authenticity.