Prove a photo, video, or story existed — and is unedited.
In an era of manipulated media, being able to prove when a photo or story existed and that it has not been edited since is a credibility asset. Blockchain notarization provides exactly that, verifiable by your audience.
Why it works here
Newsrooms, documentarians, and independent creators face two pressures: proving material is authentic and unaltered, and protecting sources and unpublished work. Anchoring a fingerprint of a photo, raw footage, or a draft establishes it existed at capture or filing time and is byte-for-byte unchanged — without publishing the material itself.
Readers and editors can verify the proof independently, which is far stronger than “trust us.” And because the file is hashed locally, sensitive source material is never exposed to notaros.
Common scenarios
Authenticate original footage
Notarize photos and video at capture to prove they existed then and are unedited later.
Protect an unpublished investigation
Timestamp drafts and source documents to fix your priority and integrity before publication.
Add a verifiable provenance note
Publish a proof alongside a story so readers can independently confirm the material’s date and integrity.
How to notarize for this
Fingerprint your file in your browser, pay $25 in USDC/USDT, and receive a certificate anchored to Base and Bitcoin that anyone can verify independently. Read the full process or the step-by-step guide.