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 0x8552fd8c6d686ea71d6f0fe69a32a154ca3fdc76aae79dc806147a3b1e74f7d5. 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/8c00b37e-c812-4edf-a19b-e2fc5fd1079a.json and https://artists.proofprofile.net/proofs/artist/8c00b37e-c812-4edf-a19b-e2fc5fd1079a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
林 光：交響曲 ト調、入野義朗：小管弦楽のためのシンフォニエッタ、池野 成：ダンス・コンセルタンテ
ベトナム国立交響楽団 ジャパン・ライヴ2018