Original Proof is a cryptographic, retroactively-uneditable record of the moment your work came into being. If someone claims a year from now that they created your photo, your chain holds an entry earlier than theirs — and the dispute is resolved by mathematical proof.
This isn't a new cryptographic algorithm. SHA-256 and HMAC are public art. The novelty is the combination: identity-isolated chain + monotonic index + server-anchored timestamp + content-hash binding, which together produce a forward-only precedence that can't be retroactively forged.
The server displays: "Photo signed by <your-nickname> on 2026-04-25 14:32:11, chain_index #847. The second photo has no NoData chain entry at all." The other party cannot claim otherwise — they have no entry.
Every photo, every document, every post you create now — sign it. A year from today, if you need proof, it is there. If you don't, you lost nothing. Precedence is cheap to buy before you need it, impossible to buy after.