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 0x8157e7bf17d0c5a9d40ceb56b82ef94a0e498723dc7de7dbc318c56285954d38. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0873afc5-c4f5-450e-8bfa-3fc6cba4f4e5.json and https://artists.proofprofile.net/proofs/artist/0873afc5-c4f5-450e-8bfa-3fc6cba4f4e5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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