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 0x6424c52f74908e151c5e65cbc3178ad5a18dcd5ee42262cc66c8b1d3044bcbe9. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b702e9d-7ba1-4dc1-8b67-9c55378b0125.json and https://artists.proofprofile.net/proofs/artist/2b702e9d-7ba1-4dc1-8b67-9c55378b0125.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).