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 0xa1640976766d6dfc4c66b01165fc47cc8fc919ee5ef7ece25b6e93cae9f0e8d8. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6f68d5c-8be2-457b-a418-1dfd5d8525ed.json and https://artists.proofprofile.net/proofs/artist/b6f68d5c-8be2-457b-a418-1dfd5d8525ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).