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 0x1cf421783b59913c57b5ec3e31ff590c3fe6ba5f3035d4b1343ef8ea4f8d5871. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cc9f81f-5fd8-4932-8d08-00812c9f52e3.json and https://artists.proofprofile.net/proofs/artist/9cc9f81f-5fd8-4932-8d08-00812c9f52e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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