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 0x065fb30a94e8dc48a1f48531b2f44a44d6ed1adfb276dde2c9bc56101eb5bc5a. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee9d989e-ab0c-4296-98f2-b2eac9dd6dd1.json and https://artists.proofprofile.net/proofs/artist/ee9d989e-ab0c-4296-98f2-b2eac9dd6dd1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).