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 0x2491646ef11b38263eecf4fb7bf5ae08e40e0154ad186794451ce54d5ab5413b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91a1c3ce-0339-44d7-9ebf-59b1dd67d3ad.json and https://artists.proofprofile.net/proofs/artist/91a1c3ce-0339-44d7-9ebf-59b1dd67d3ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).