1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x1fd96122ff3c14f1b58a5f64483262b35479f71f6bbdac4ab55d917ef3077b5d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c238f60c-b81c-4e54-a7b7-771dda1f839e.json and https://artists.proofprofile.net/proofs/artist/c238f60c-b81c-4e54-a7b7-771dda1f839e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01aa8849beba62cff3ee1b75153b255e79526713a98a5a97a79082f270589593. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6oShQRlLbYC6ewb7orMHbe.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6oShQRlLbYC6ewb7orMHbe.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdc06a3966ee928c1f11784a844d729d5421798cbdf13fa2202b6d958fe12e5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2UI7K5SIgG6ljJjNk6laGL.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2UI7K5SIgG6ljJjNk6laGL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bb5887ad91b6c61d74c6575996e6ff82d53d9a0b72da2076e72aeb305314b7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/29cX7xRhGOo2ljVKCsoBec.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/29cX7xRhGOo2ljVKCsoBec.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906287ffff6802fc258af56970eebdb3709d1f6730ab7ab1f9e9951880e66080. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0MBPQWCy70VuV22AQckYTa.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0MBPQWCy70VuV22AQckYTa.
{"copyright_id":"0xa1bd22f41295ebaaf23833490f443bcef923d0bee5c7c564864bc0db5101bc13","isrc":"JPS801837804","name":"Special Special","registered_at":"2026-06-11T06:08:18Z","spotify_id":"1zKc5rlGwZwCYFfksaznL7","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bd22f41295ebaaf23833490f443bcef923d0bee5c7c564864bc0db5101bc13. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1zKc5rlGwZwCYFfksaznL7.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1zKc5rlGwZwCYFfksaznL7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c911f4d5d13ecb249d294a68deb428016704c01935f6cb61de3d59da4f0bc9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1uciW6xDRJx2d0fMwhSUS2.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1uciW6xDRJx2d0fMwhSUS2.
{"copyright_id":"0xbdda9ee7e6cd4ad0c47aae2232f551efc1da583d71c3b1019af7014185188e9f","isrc":"JPS801837806","name":"Life as a journey","registered_at":"2026-06-20T04:27:07Z","spotify_id":"6g2uqOiGPBRkVjtlcLzjUX","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdda9ee7e6cd4ad0c47aae2232f551efc1da583d71c3b1019af7014185188e9f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6g2uqOiGPBRkVjtlcLzjUX.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6g2uqOiGPBRkVjtlcLzjUX.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed68c268d175dda8a1e60f8975507625b7f3740f7f88f30f3af08b9384b8448. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5wIxVPqiHdWqERTcAUJAjt.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5wIxVPqiHdWqERTcAUJAjt.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92acdc782297c80ea5e4e6c7386cbfad7d495a9e7140daf0a7f578325bc9332d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/60AOv0R35mYDTqmhv5uDA4.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/60AOv0R35mYDTqmhv5uDA4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce142b289a487b45ff7a7bd4b076cae113306069854abd7fb0c022352b8401b5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/56tLv39YqCQLJQ6NsPord9.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/56tLv39YqCQLJQ6NsPord9.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5292a0bb974327601e8a72197e04eb9664c7ecccd43d8d5ef219ca2fe35769. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7iwUj6pr8hyHZ3VPC3x8ok.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7iwUj6pr8hyHZ3VPC3x8ok.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b21e105eb4a542f329b8e1256b293c7f97f30cbc6dfe0746a61ae7278375958. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6sq0TrnwESb6fUCRQKeNnA.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6sq0TrnwESb6fUCRQKeNnA.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3dae2630c15327aa7a2cc0123419f1ed8792dfb96b8848d031d44e9db25656. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7uXxTk1BBURI0QtD9aQhLJ.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7uXxTk1BBURI0QtD9aQhLJ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50bba2f3413471d13128d949c461baba323929e731d3b7c669e0330cf49ba41. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6MRxQrowK7jHiK7aSpoMDP.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6MRxQrowK7jHiK7aSpoMDP.
夜風に吹かれて with PUNCH&MIGHTY -Instrumental-
Return to the womb (feat. Kazuhiko Maeda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117345476ec17cb5c57e80c6e56ad2cd12d8acef2c0487d19eb31e2f60d3d050. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/29FiTz45bXvaQpuVDR9ych.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/29FiTz45bXvaQpuVDR9ych.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b1afe9bfaecbe5812f334284898286cfa24e285d93f9cea969569986739d76. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0kTC9iCNOcwuQOkQGGUh1J.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0kTC9iCNOcwuQOkQGGUh1J.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5686405a1ee13294d14119ebf31aa0180de0c0b480e0c75fa44111725a426ebb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2dB4dQ7S0xeRbf5j2hStr1.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2dB4dQ7S0xeRbf5j2hStr1.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79176d0e91dbb79372be178a3c3cc32ed81babe99710a9513637e192d7406a93. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1jNKqNbOB1bHmx3TR3QhZD.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1jNKqNbOB1bHmx3TR3QhZD.
{"copyright_id":"0xdf8d5c3738e4ac7757dad21a979d1fd04184c230a55bc3afd7572cee372fde68","isrc":"JPS802100179","name":"果汁牛奶 (Fruits Milk)","registered_at":"2026-06-08T19:05:24Z","spotify_id":"28BBYm7AkgJ0VInvWfPKkk","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8d5c3738e4ac7757dad21a979d1fd04184c230a55bc3afd7572cee372fde68. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/28BBYm7AkgJ0VInvWfPKkk.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/28BBYm7AkgJ0VInvWfPKkk.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe415c64ae1cc6bcdefa98dbd5f56fb84dad6e5059a0072f6a5fdf87f677750b3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1D6fxGKcI3JkOZPKrLKPn0.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1D6fxGKcI3JkOZPKrLKPn0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda3dcc7d3b52aff740b1b9666e4eaae9828e7004276f47e0c66bd28bf44ecc1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4KxhR5dl2img0KmGHpuZoF.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4KxhR5dl2img0KmGHpuZoF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115aec6847dfd48a3c2ffe5d5a9bf7b7649ca80d353c18348bf442507dc687a2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0ASHpcIqI8RPH90Vn9PDXc.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0ASHpcIqI8RPH90Vn9PDXc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a730337c7c3eac519a2525c5f6346a4f646756e7030bb7f208daacd7e3da2e2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6zs69u8CG1q3CQiTh1ch14.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6zs69u8CG1q3CQiTh1ch14.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351b1d241d99348026b1245cd55ed9456a5981383235857b9ce382b2533555bd. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5vSU4oh8qQkNsL8nSZQLNs.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5vSU4oh8qQkNsL8nSZQLNs.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f25db182456d3e767eab75ed11c2f84d1c16e763ac6ebbb06b1b762a7d42725. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6yTDCHYkw98CIgWxW7rJPQ.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6yTDCHYkw98CIgWxW7rJPQ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f07a64dcaa49bc3cae93cd986d6f545c404b2d950f1b4b6cb4354914d97d64. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7Hq4uzdinBBvL9xQQ4hy3f.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7Hq4uzdinBBvL9xQQ4hy3f.
{"copyright_id":"0xbd25e37e2dfdafeb8274e6b4be4c7ab44334a63898d9357ea497567665d48714","isrc":"JPS801500161","name":"HIT NUMBER - EVISBEATSとPUNCH REMIX","registered_at":"2026-06-04T16:16:49Z","spotify_id":"3qAT9iw2AiiJ0CxTcqxQn1","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd25e37e2dfdafeb8274e6b4be4c7ab44334a63898d9357ea497567665d48714. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3qAT9iw2AiiJ0CxTcqxQn1.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3qAT9iw2AiiJ0CxTcqxQn1.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4efbe816c49a9aed3bf99f265e82e8845a9a5e083d33f6667b7f81774772894. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4g67SysRy5Ups9gQ5qPhID.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4g67SysRy5Ups9gQ5qPhID.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4efbe816c49a9aed3bf99f265e82e8845a9a5e083d33f6667b7f81774772894. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/31adzA6Lq8gxce2h0a1Ykp.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/31adzA6Lq8gxce2h0a1Ykp.