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 0x89eda106d8b4d9101bf10bdad89a9b2aaafe8208e23453bbf8f2c1698c8817a7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69377817-3c1f-4a55-b7bb-5969a9e5dd0b.json and https://artists.proofprofile.net/proofs/artist/69377817-3c1f-4a55-b7bb-5969a9e5dd0b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).