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 0xd105c78817fea3b1b2fb47abbe9db423d40da360a6255e4f3f2ced9db391d655. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eda83a64-6102-4914-aa26-f70384569ead.json and https://artists.proofprofile.net/proofs/artist/eda83a64-6102-4914-aa26-f70384569ead.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
レム・ウラシン プレイズ ロシアンスピリット
ピアノ・シュロス コンチェルトシリーズ Vol.15&16
ピアノ・シュロス コンチェルトシリーズ Vol.13&14