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 0x04e20936ebcb4100a50166b407807d05ae04df11bd36817ea845ccf26066ab9f. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27165449-4a19-40fc-aede-8dd008dac81a.json and https://artists.proofprofile.net/proofs/artist/27165449-4a19-40fc-aede-8dd008dac81a.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 0x0cd61938b882ae723dd00c5b9748c0829e669d2b67543e926e367beda2b9c9af. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPW561903109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12060fede97a28a27ba3209425265a95dd2ede8b4ff7d4030179fe780d63f53a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPW561903113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e53db38aa8be90b808fb99a08eb0858b8422500ab75e26328f793159e2c709. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/JPW561903115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a9caa3ce1225069b257e5e84264cbfc8381bf7412c2e7a667289df3184b61d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPW561903118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0e0c844f002bdf931dc090ecfa1369eb4dbf5092c80ee9f9523c9674ad2483. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPW561903101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988050551a2a7a025e3c388e1f475e917edad66cf67dc18633bf8f6273eb485c. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/JPW561903102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd402c27f81ff438c583576a72e810ea6762b4f5defa174dac1e5a3963e929126. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/JPW561903105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7b6bd3147ebcc0caf7b79c907004d8b5576f1defd6139a4e777450e0dd3ae2. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/JPW561903106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f206567bdfd554d5497f292f58f020faa10b8e5985e119381f6e2e7118af660. 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/JPW561903107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f542a0b7084f82c61a497a623ff520a290cd84ccabd26f89a0420d1e51479c. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/JPW561903108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c4658d9ba2b5435fd71081496eb6331fe4193f87c0a1cc32816acea63165cd. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPW561903093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef52abba6622623b4fb904756e54f89e99fd4bf4bca1e5cdeec348c760f8cc5. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/JPW561903094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851a74c72b84c06eab71bf0e180c793641e626a5360e5fcf2ab0e228dccabd31. 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/JPW561903095.
儚き人の為のカンタータ -re-(feat.灯火はこ、)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a6b586fd4bbda25b01d4fdd53a458e6dcc7974538db499ddc4b539b7ab52cc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JPW561903096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e100153bc98c01008ae233dfab63f31820f4cbb0f3d057510d410dfb49e954. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/JPW561903098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4925a6010100ba6439ac146ede5309e92ddb8bad68551d61429e0b9047e67c. 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/JPW561903085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aeaa15debaaee4c0078576d46979e20c39360b74e2d8886eed5b96621c0cd17. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/JPW561903086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14584f542f07927fb14ccdb4e001eb0514d43b240ee8357bd8adf37b3e1b5baf. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/JPW561903087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5acf28a2e4ff0119d48468ba8c52231d5ef5a60245bd1014f5a06da1f92bc04. 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/JPW561903089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aaada4df11cd57aa34a8c085fd264db413f06ec3b4d89b4ee3ac0d43d2d2ca9. 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/JPW561903091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb47d27385f18ba07f463248182bea194a1615c3cf6cf7b7825716e998a16a23. 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/JPW561903077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1b12b2f40488990280ace8d065c2a434f584a89eb09649b93aadba7e243c48. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/JPW561903078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8a6b0b14c9a642277f689798bf68becbd81e3bb2a597f6927cba6263d5df19. 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/JPW561903079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1361039a1f6b235a2abffe013623908d9bb17b33e957b683f1f89e5220b93728. 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/JPW561903083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e85247c9ffb413e87add8a3bdde36c7edb637bd248ecfeff98fc4124a2d121. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/JPW561903084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d59e9cff025f9acd8bd177019504eb33ab80b21e928da4804d1765114c679be. 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/JPW561903067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa073c456cba49a1637bf63184965b0d9fca0f1f1cecb78607109ef2e4994dcc3. 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/JPW561903070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98cebbbab9b6c2d5fc4ac9a468851868a6ddb5f8bf323faa85b0f5fa6051f4b. 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/JPW561903074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0817d4051c1ee84d9aceaab29d4256d502e512aa11a8dd4e6d647ec44b67c1. 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/JPW561903075.