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 0x30d511fa4fe74f809c2c5aa591de2b2d224648b32d4ac0fbb102d41ed45e8930. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78b400ab-5c32-49aa-b339-225ec28ec005.json and https://artists.proofprofile.net/proofs/artist/78b400ab-5c32-49aa-b339-225ec28ec005.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
CAFUAセレクション2004 吹奏楽コンクール自由曲選 ｢ジェリコ｣
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 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 0xf48669833250b1ba11c44fbceaa1980ff9c503a304a69e3db4b05845527bc183. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPG600405204.
スクーティン･オン･ハードロック: 3つの即興的ジャズ風舞曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b14f904aa744933d1ace5cb8b05b6a3c77309d83b0cbd4b98b4d847c2c553f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPG600405205.
CAFUAセレクション2005 吹奏楽コンクール自由曲選 ｢エブリデイ･ヒーロー｣
CAFUAセレクション2006 吹奏楽コンクール自由曲選 ｢オペラ座の怪人｣
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405ba0683016f8a5868337fd18fcfbf76b4de73cee9a9891a11dc67026ecd903. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/JPG600608007.
CAFUAセレクション2007 吹奏楽コンクール自由曲選 ｢メトロプレックス｣
CAFUAセレクション2008 吹奏楽コンクール自由曲選 ｢バンドのための民話｣
CAFUAセレクション2009 吹奏楽コンクール自由曲選 ｢プロメテウスの雅歌｣
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087a6b8d73547431040d6231747fa306ce74494367b6a90f8d739e22fa52fedd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPG600912907.
CAFUAセレクション2010 吹奏楽コンクール自由曲選 ｢交響詩『フィンランディア』｣
CAFUAセレクション2011 吹奏楽コンクール自由曲選 ｢ローマの謝肉祭｣
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bc647cfbe7400215b639268be04e09918e267420984137cdc6aeb98ef78019. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPG601116313.
CAFUAセレクション2012 吹奏楽コンクール自由曲選 ｢火祭りの踊り パラフレーズ｣