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 0x81ae579e08d3d4df9f2c4fe567d58aa6e5dde6701c8d43cd5c7eeb8d8fbad6fc. 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/59bcf97d-fc93-431f-a791-a96e7ca35f20.json and https://artists.proofprofile.net/proofs/artist/59bcf97d-fc93-431f-a791-a96e7ca35f20.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).