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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10aac89b19a7b5afa5da93f9b8005b4ab7235507d7bad7c0eac13d8039bfed88. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5df12949-a95d-484e-9058-7507c5b4e3b9.json and https://artists.proofprofile.net/proofs/artist/5df12949-a95d-484e-9058-7507c5b4e3b9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Masterpieces of Classical Music for Deep Sleep
An angelic piano album that brings good luck into your life just by listening to it.
聴くだけで人生に幸運が舞い込む天使のピアノ小曲集