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 0xb608d0abf71f26be5936348603bfffc70515c7d6383be97431d18898d70f51a2. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bf83a12-36c2-47ec-b368-b4cf46689215.json and https://artists.proofprofile.net/proofs/artist/9bf83a12-36c2-47ec-b368-b4cf46689215.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ピアノ絵本館 チャイコフスキー作曲 くるみわり人形 (れんだん)
ピアノ連弾シリーズ フランス3大連弾曲 ドリー / 小組曲 / マ・メール・ロワ