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 0x0f5d3612a1c5d3c40cbc72655fdefa2afe720c9c56ba970051a2f2bacfe40eac. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57832a41-9a2e-4234-ad8a-3a0ba7a2b693.json and https://artists.proofprofile.net/proofs/artist/57832a41-9a2e-4234-ad8a-3a0ba7a2b693.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).