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 0xb953d1ccd90d36c9ad8193e67f93c955cda91a8d788b61dc9714e74077ab10e3. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ef015b2-9dc0-4043-a2a2-68876ea29fe1.json and https://artists.proofprofile.net/proofs/artist/4ef015b2-9dc0-4043-a2a2-68876ea29fe1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).