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 0x18194f82e1d9c45cfd36c0207f38de122f9f8d9e2c6934a47645c20d33ccfbd7. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1e1f19f-42c1-442a-88c6-b22d06cc3ccb.json and https://artists.proofprofile.net/proofs/artist/e1e1f19f-42c1-442a-88c6-b22d06cc3ccb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x22f45912043ca7bc6e8d37f1e7c4562a83ec9e191075ab05fad935955d3caf61. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPCO00115830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7b31133bf9b46a90a808111cc6ebe0a97b07f068a37cdf8a8f594610bf4cb1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPCO00115850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef82aa90b23513ac46d6b47379c75253c8cd3ccc85b5f7ae3e528e43ff931c70. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPCO00115860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f31d43a1da87108cb7948728de5d0e73016dca9f2eecf8fc507573d4dc3fc9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPCO00115870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8eeda273e4ecdc74638a97e24d56f147c1906d09762651c401530a26a4a7ae8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPCO00115880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188fe0572a451bb09a7b00534f968e58dd29883006dd9aa190140776b7727308. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPCO00115890.
ピアノ・フォリオ…消えたプレイアードに寄せて
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe647dcbc540f879d49ed23f4cc25d72a400d308ca16d1b7b8bb8f18008a833a6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPCO00115900.
プレイアデス舞曲集VI op.71 1.小さな春への前奏曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ba0f387ee7c60edfcae89f3d913fd714c1db48848eebb1a8ea38adde3fb077. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPCO00115910.
プレイアデス舞曲集VI op.71 2.春の終わりのワルツ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbd340ba2a9bd0b69cc5e4fd938b5f99cf13aa650e8243f3effa22abfe53eeb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPCO00115920.
プレイアデス舞曲集VI op.71 3.夏のパストラル
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4917e3160099de5c1da5a6e5559791f4d9313fd1b79b2c4ff90feff0c68e9a04. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/JPCO00115930.
プレイアデス舞曲集VI op.71 4.けだるい夏へのロマンス
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3273b708a41700d1a46c09852e106b3127e52520b2870699ce53a9d33fd16101. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPCO00115940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0467e596e6751ff9fe396444f2ee059bba0c72368f6a146b164ae22d1019f6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPCO00115950.
プレイアデス舞曲集VI op.71 7.ロンド...春ふたたび
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26950f5582fb12d06a890ad9624b6224d4a667b5dc162179428f053c8e94f78b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPCO00115970.
プレイアデス舞曲集VII op.76 1.途切れた淡い前奏曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeec81c7f1fc85ecc3f5667dac05c841f44bc61bbc4bb239c6fb20f41161b376. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPCO00115980.
プレイアデス舞曲集VII op.76 2.静止した夢のパヴァーヌ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6491ed4da8bc470977cf934a3b3fd253ce59fbc11647c18a355a465dc0883996. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPCO00115990.
プレイアデス舞曲集VII op.76 3.数え直しのワルツ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671df7accfad22ca32eede8d10b67fe9b45880898b6f504f5ab21a435b42becb. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/JPCO00116000.
プレイアデス舞曲集VII op.76 5.遠い夢のロマンス
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50de89421401766395ff3050f00218b4232d27f40f1adc826228044db396cd7f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPCO00116020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf821039814e0a917f2c69d0888dd9cd58b88264a078adf899386a56539cc2f8d. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/JPCO00116190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11410a9bccce5a3d68ec4e1900e28084e1f2c087acbebbbb36691bc679f7767. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/JPCO00116200.
美しい夕暮れ 〜ヴァイオリン名曲集
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b1b66df93271b0b6ebff0d611505a0a8b720bcf7840a51c19a7beee763e988. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPCO09638480.
アマービレ 〜アンコール・セレクション
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe934e415a5a55f64e7813db9b14efd706228481243c885ef3b61d0245517fa4d. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/JPCO09253680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdfa63951fbd5e5d931cb71a489341929ec8054136be425fb6b7545880985ca. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPCO09253690.
アトム・ハーツ・クラブ・デュオ