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 0x2776048042afeff5c61e550c6670936f36c09acf766eb5cd438a2f8e4ac0e888. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2b9c8c7-07bb-410e-a15c-07170debb5a9.json and https://artists.proofprofile.net/proofs/artist/e2b9c8c7-07bb-410e-a15c-07170debb5a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
演劇 花咲く港 オリジナル・サウンドトラック
音楽劇 小さな星の王子さま オリジナル・サウンドトラック
The Little Prince - Original Soundtrack of the New Festival Musical
新・祝祭音楽劇 小さな星の王子さま オリジナル・サウンドトラック