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 0x6fb8c7dceef6b04160b28ee776ab6b293fc08f689da3dec2db75acd393c1c0de. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7503d1ee-2eb7-4f0b-a673-da35a9d9feff.json and https://artists.proofprofile.net/proofs/artist/7503d1ee-2eb7-4f0b-a673-da35a9d9feff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).