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 0xb1967fcf6bd2d25ed76e7b6515cea8f76e7f3cbf436046cb2e18692d51675951. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c8e4681-6a1b-4c4d-a21d-56dad9766879.json and https://artists.proofprofile.net/proofs/artist/3c8e4681-6a1b-4c4d-a21d-56dad9766879.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).