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 0xf4a840b2906d7054a38807f61874b605eacbe96ec75d0fb2fe4e9b005fa5ae60. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/763e9cf5-91a9-4e0b-9eb3-257a1dd71fb7.json and https://artists.proofprofile.net/proofs/artist/763e9cf5-91a9-4e0b-9eb3-257a1dd71fb7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).