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 0xc2801b84070ab413b5fcdf4f8597afb328f86f5616d23248ff5ff8aad52102c2. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/213f6c45-952e-4950-af57-23bc4a95c051.json and https://artists.proofprofile.net/proofs/artist/213f6c45-952e-4950-af57-23bc4a95c051.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
シャープ・ファイヴ・スクリーン・ゴーゴー
A Lullaby of Abashiri / The Shortest Love
ロック・アラウンド・ザ・クロック
シャープ・ファイヴ・クラシカル・センセーション 四季／剣の舞
Sharp Five Classical Sensation: The Four Seasons / Sabre Dance
ゴールデン☆ベスト 井上宗孝とシャープ・ファイヴ