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 0x8a4bea115b1cd1af4469da9cb4bcbed58425335571603470bacd3419c5e1496d. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18ce9a43-f109-4372-bd01-9e6f9c9fdc3d.json and https://artists.proofprofile.net/proofs/artist/18ce9a43-f109-4372-bd01-9e6f9c9fdc3d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
喫茶店カフェＢＧＭ: カフェミュージック, 心地よいジャズギターアコースティック
夜のカフェミュージック: カフェ勉強のリラックスジャズ, カフェ気分, 作業ＢＧＭ
カフェミュージック2023: ジャズ音楽, 喫茶店やコーヒーショップの雰囲気
Bar ジャズ喫茶 & イージーリスニング: 快適な作業音楽, 喫茶店カフェＢＧＭ
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aedb75f98055b3b4b35027aec357810b323809cf5d414164afa5b68a78d0094. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO102217883.
夜カフェJAZZ音楽：喫茶店落ち着く雰囲気・ジャズギターリラックスサウンド
喫茶店ジャズBGM：リラックスカフェ・夜スロージャズ・コーヒーブレイク