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 0x9159488b320d617a865a801c8528cca134666fe813db6329357b4dd352d9a5df. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b8780a8-358b-4e58-8ee5-f765980eaa97.json and https://artists.proofprofile.net/proofs/artist/0b8780a8-358b-4e58-8ee5-f765980eaa97.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Telework BGM 30 songs ”Lo-fi Sounds for work that increases concentration at Cafe and home”
テレワークBGM 特選30 〜自宅でカフェで集中力が高まる作業用BGM〜
SOUNDS OF PEACEFUL PIANO 〜The wind was calm and the sky was blue
SOUNDS OF PEACEFUL PIANO 〜There is always light behind the clouds
SOUNDS OF GRACEFUL PIANO 〜When it is dark enough, you can see the stars
SOUNDS OF GRACEFUL PIANO 〜Because I have a dream, a life is brilliant
Beautiful Piano 〜soothing sleep stories〜
Refresh Guitar Cafe ”popular song cover”
LoFi HIP HOP - calm beats mix - Music for Studying
LoFi HIP HOP - Relax beats mix / Music for Studying
Christmas Beats Lofi Chill Hiphop -Relax mood-
Christmas Beats Lofi Chill Hiphop -Chill Out mood-