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 0xaea3e88b54e10d484701b00127493a38fa3de2ac8e947de9126bf24c03f92fd2. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/946616a4-713b-4d7a-84cc-0911203878c6.json and https://artists.proofprofile.net/proofs/artist/946616a4-713b-4d7a-84cc-0911203878c6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sleep Switch ON - Piano for Blissful Slumber
睡眠スイッチON ～極上の眠りに誘うピアノ～
Creating a Sleep-Inducing Space Good Night BGM
Alpha Wave Piano for Deep Sleep - Ultimate Relaxation
Rejuvenating Mind and Body with Soothing Piano
深い眠りで心身回復 ～心地よいピアノ～
Sleep Piano for a Deep and Restful Night
おやすみスイッチを入れるためのα波ピアノ
Gentle Piano Lullabies for a Comfortable Sleep
やわらかなメロディが心に響くヒーリングミュージック
ストレスを洗い流す清らかなヒーリングサウンド
気持ち良すぎる昼寝の世界へようこそ