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 0x807a67c86c7dee9f5842e223a1595dbe57976427632577a38ca2ee233e28e9ba. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ba25d1d-ab77-4d3a-9c61-f7acc7499d48.json and https://artists.proofprofile.net/proofs/artist/8ba25d1d-ab77-4d3a-9c61-f7acc7499d48.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).