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 0xdf530cc1262d7b28633bb2515b831470a69b3bac53aab49ec32607b508676607. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/566ab0ad-2613-4e17-a6d4-fe86a41871c4.json and https://artists.proofprofile.net/proofs/artist/566ab0ad-2613-4e17-a6d4-fe86a41871c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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夙川ボーイズ（やっぱレコードやネ)
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