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 0xf03abf0c035d0c4be20c8a8310d4b9c7fe3c88fadc86b03ef1fb68a43a07c21a. 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/4ffdddf5-00ed-4cd7-b130-c6a96d06e852.json and https://artists.proofprofile.net/proofs/artist/4ffdddf5-00ed-4cd7-b130-c6a96d06e852.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).