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 0xc47e8d7021b163ec0b9ac3d8c27e2a936666efe428967d0c604c6ffaa89cee0e. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7aa1fd93-8538-4cc2-95cf-c1bf427f7a01.json and https://artists.proofprofile.net/proofs/artist/7aa1fd93-8538-4cc2-95cf-c1bf427f7a01.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).