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 0x80add1f82d070562e9c1cc0f1d6e06af7d20c4219a53233339b0aa81b2413cd5. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47cf48c5-2562-4478-8e8d-b7dd48ab7ae9.json and https://artists.proofprofile.net/proofs/artist/47cf48c5-2562-4478-8e8d-b7dd48ab7ae9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).