渡辺俊美(TOKYO No.1 SOUL SET, THE ZOOT16, 猪苗代湖ズ)
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 0x42fa6505b539f43bf6b00995c866ac78e27be7a528a4d41d6384fe759229100b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40d01771-225e-4345-8bb6-d69dfe48b6d6.json and https://artists.proofprofile.net/proofs/artist/40d01771-225e-4345-8bb6-d69dfe48b6d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).