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 0x1284d0c3dd8f00c9d3d248e94587976eca95bf0b2af7a84ad7095dd17ed48c2e. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a56b5d4-59af-4db1-9a5d-0779df320d19.json and https://artists.proofprofile.net/proofs/artist/9a56b5d4-59af-4db1-9a5d-0779df320d19.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).