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 0x2dc498ee39d2652c1548c7726442ddb09ea5e43c44ec7276a25e75f13d3955b2. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7b80f4e-f7ee-4a98-b0c2-6a7becd3912a.json and https://artists.proofprofile.net/proofs/artist/f7b80f4e-f7ee-4a98-b0c2-6a7becd3912a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).