1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ae84693730f61e38410db1c79c4178df122ae4078b1277d0227da99341c75c. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c170ad8-d81f-489b-b8c6-af192f2351c7.json and https://artists.proofprofile.net/proofs/artist/6c170ad8-d81f-489b-b8c6-af192f2351c7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sampler MMXXI (Les Acteurs De L'ombre Produstions)