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 0x58a576e0bfd9b3467551bc70aba8c8f0b3021fdc113a5d479b65d019cda67f4e. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c246dbf1-59c2-4fc9-b0f7-4ac916a511cb.json and https://artists.proofprofile.net/proofs/artist/c246dbf1-59c2-4fc9-b0f7-4ac916a511cb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).