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 0xfeb6fd64a1c4c88f59580ff7a34e3f8ad17f70e5706fe6f21105457054e60947. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22729d0a-2c39-43be-9b7e-3f130fc6f00b.json and https://artists.proofprofile.net/proofs/artist/22729d0a-2c39-43be-9b7e-3f130fc6f00b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).