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 0xa6cf12915e0009e0aa147410651153e60e7d7ce52d5a040e49778289a4811323. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1600b934-080d-448d-92cd-af2582a49bb5.json and https://artists.proofprofile.net/proofs/artist/1600b934-080d-448d-92cd-af2582a49bb5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
喫茶店で読書時間: 読書に集中できるピアノ音楽, 夜の読書時間
作業用カフェＢＧＭ: カフェ勉強・集中力持続, 朝勉強, お家でカフェ気分
読書家の為のＢＧＭ: じっくり集中するピアノ背景音楽, おうち時間
夜の趣味に没頭する音楽: 読書や勉強, ピアノ作業ＢＧＭ
読書の為の喫茶店 - ピアノ音楽, カフェ作業, 夜の読書