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 0x0adf4ff21d73aa75c94188482d765ed422f3df60b3345299ed4f2977b49d8302. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14db0c47-7ff0-4644-b2c2-e0b9c6ad04d5.json and https://artists.proofprofile.net/proofs/artist/14db0c47-7ff0-4644-b2c2-e0b9c6ad04d5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).