1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34ee91923314a88693d33aca660eae25b382a7a2915e83530d7d1c8d318904d. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84685fb3-382e-4997-b6b1-ddfb05e562fa.json and https://artists.proofprofile.net/proofs/artist/84685fb3-382e-4997-b6b1-ddfb05e562fa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
日本の流行歌スターたち(38) 安西愛子 青葉の笛～この日のために-東京オリンピックの歌-