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 0xb136acc7d202f88ac078e699f0ca2a89d4318a4acdcfa8dd7414f0dec7b20aa5. 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/5f3f2eb9-f95c-4067-b875-b2c428260c9b.json and https://artists.proofprofile.net/proofs/artist/5f3f2eb9-f95c-4067-b875-b2c428260c9b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).