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 0xf91dae237fe263e1a35dc3df096c03f43b35dd601a104d8b7ddb1b1de4c0949a. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9242acb-57e4-4e8c-ac86-ed28116b40cd.json and https://artists.proofprofile.net/proofs/artist/b9242acb-57e4-4e8c-ac86-ed28116b40cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).