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 0x9544740b4cef4ea7f9a706c3c06a98ae5f5f6ec92c4b79de45fee55713e24c91. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6b48a68-fd5e-40b8-9b30-4e63ad19011c.json and https://artists.proofprofile.net/proofs/artist/e6b48a68-fd5e-40b8-9b30-4e63ad19011c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).