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 0x293a1af7a2c4f3b5ef210f3f7f61dd89b1425cc1676feb7ac516b8707a622a59. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d4af7ce-c11a-4e92-b252-fcbd582e27ca.json and https://artists.proofprofile.net/proofs/artist/5d4af7ce-c11a-4e92-b252-fcbd582e27ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).