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 0x376abb40b97de8c5901794f2baa05da3c2be1805e721c236be439098d14f8dba. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/779a3de4-4d0e-4660-963e-0d2e9591928b.json and https://artists.proofprofile.net/proofs/artist/779a3de4-4d0e-4660-963e-0d2e9591928b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x552311fdb1efd549a1dced62f3d82189cd335cd2b4ff42cab2c97e638f11d306","isrc":"CZD551400001","name":"Začíná Se Pohádka","registered_at":"2026-06-08T13:31:27Z","spotify_id":"6cYsfVFrJcvUBzMFs5IpE2","type":"track"}
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 0x552311fdb1efd549a1dced62f3d82189cd335cd2b4ff42cab2c97e638f11d306. 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/6cYsfVFrJcvUBzMFs5IpE2.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/6cYsfVFrJcvUBzMFs5IpE2.
{"copyright_id":"0x0c0af7a01bd187a523e8cd8dc8cc4f1cd3a3c2061b15959099e0b7eaee6976c7","isrc":"CZD551400002","name":"Na Zámku Jsme Sami Žili","registered_at":"2026-06-09T19:19:39Z","spotify_id":"5AqNBUq3pHhH9uzLzRRpCL","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0af7a01bd187a523e8cd8dc8cc4f1cd3a3c2061b15959099e0b7eaee6976c7. 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/5AqNBUq3pHhH9uzLzRRpCL.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/5AqNBUq3pHhH9uzLzRRpCL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982d67e8c82ef5024570697baab1e0e0d521b0ac06315042959939c557e7908b. 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/2KKKzYZDTPPqa1R5NIf64o.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/2KKKzYZDTPPqa1R5NIf64o.
{"copyright_id":"0xfb3509ff295d4c809d43136a6a5c23e17688ee5172bdf6c9f0fab1aaa7d58875","isrc":"CZD551400005","name":"Tři Bratři Jedou Do Světa","registered_at":"2026-06-09T19:18:13Z","spotify_id":"0EC2scPw3CmQPdG2KBriNc","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3509ff295d4c809d43136a6a5c23e17688ee5172bdf6c9f0fab1aaa7d58875. 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/0EC2scPw3CmQPdG2KBriNc.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/0EC2scPw3CmQPdG2KBriNc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d54496212916ce5082c1cad55cd7b66827bb17aa9b864d593911d59542852b0. 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/6xKNHJwiZXJAzqvF5XOlc5.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/6xKNHJwiZXJAzqvF5XOlc5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1bddb461b4bab5c9233586a056ab8067e5288b30a538840973855159b8d2f5. 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/4m5QNNxH2tbRRHpc1NXHNk.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/4m5QNNxH2tbRRHpc1NXHNk.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398a33cda96581110d04430888cc0919606fad79b27fc815965658cf9af8cc8e. 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/2bQNDfxcrdNuy6Mdwc0mW1.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/2bQNDfxcrdNuy6Mdwc0mW1.
{"copyright_id":"0xfcec30e4e70fa8736bd11a036556efa40eb8899ccc0d3ae526286ad385424317","isrc":"CZD551400011","name":"To Byla Ta Pohádka","registered_at":"2026-06-09T05:09:42Z","spotify_id":"7uCnzBKdEA2xj9emqMpjQZ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcec30e4e70fa8736bd11a036556efa40eb8899ccc0d3ae526286ad385424317. 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/7uCnzBKdEA2xj9emqMpjQZ.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/7uCnzBKdEA2xj9emqMpjQZ.
{"copyright_id":"0xa9da39e455b6be9c99be2f360b00260d5b6a0e3a371edbee21d4fd2e216459aa","isrc":"CZD551400014","name":"Dobrý Den, Ptáčkové","registered_at":"2026-06-09T09:33:59Z","spotify_id":"2BoTP8KE0tKNeVctPpQdd5","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9da39e455b6be9c99be2f360b00260d5b6a0e3a371edbee21d4fd2e216459aa. 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/2BoTP8KE0tKNeVctPpQdd5.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/2BoTP8KE0tKNeVctPpQdd5.
{"copyright_id":"0x3774e7cbaa4b9ee82b7593807f605ad70258d1e69c0cbbcaf899aff7d349e1c8","isrc":"CZD551400015","name":"Dívka Důvěřivá","registered_at":"2026-06-09T19:15:05Z","spotify_id":"6I8BpS8p5Wkt0qpdk5YyMD","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3774e7cbaa4b9ee82b7593807f605ad70258d1e69c0cbbcaf899aff7d349e1c8. 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/6I8BpS8p5Wkt0qpdk5YyMD.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/6I8BpS8p5Wkt0qpdk5YyMD.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9e1e6f7c1031b72e16e811b0dfe6d33214df630d0261e8692da8773d78e16f. 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/1dpX3zgE9O016UKFRZRWs1.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/1dpX3zgE9O016UKFRZRWs1.
{"copyright_id":"0xeb07873e20bd70ec10a764d9c3c9c39b74925f2417de1b9d3919d218bd05f3a5","isrc":"CZD551400019","name":"Červená Karkulko","registered_at":"2026-06-09T19:25:28Z","spotify_id":"7aAsFYm1acoiLKhNncqeYF","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb07873e20bd70ec10a764d9c3c9c39b74925f2417de1b9d3919d218bd05f3a5. 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/7aAsFYm1acoiLKhNncqeYF.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/7aAsFYm1acoiLKhNncqeYF.
{"copyright_id":"0xded67d633e947fefda1584a662a5db0ec625846610206369bcd1e7dce3196c04","isrc":"CZD551400021","name":"Do Pohádky Vedou Vrátka","registered_at":"2026-06-10T05:47:30Z","spotify_id":"3bQ4h9aLf3YHSONRzAgjwA","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded67d633e947fefda1584a662a5db0ec625846610206369bcd1e7dce3196c04. 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/3bQ4h9aLf3YHSONRzAgjwA.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/3bQ4h9aLf3YHSONRzAgjwA.
{"copyright_id":"0x6e044482fdb670957d96ce4ea403d7b1d70dc82bff57f18ff6f59f3d56345031","isrc":"CZD551400024","name":"Když Je Noc Lednová","registered_at":"2026-06-11T13:48:28Z","spotify_id":"2Ng2AwaIXmIGy5OXVLJzZb","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e044482fdb670957d96ce4ea403d7b1d70dc82bff57f18ff6f59f3d56345031. 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/2Ng2AwaIXmIGy5OXVLJzZb.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/2Ng2AwaIXmIGy5OXVLJzZb.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564526ab656d4df76382af2acfe68f3d7ef830af59af53ba8b876e93b1ecd050. 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/2Yf7d1U6FYIAlAfnwy3yE3.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/2Yf7d1U6FYIAlAfnwy3yE3.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5de2d8036d93e364702d73a2f2616170041930a56c6d3258b444d329db0939c. 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/6l6tu7GrCP7lhm3Dj1bpfh.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/6l6tu7GrCP7lhm3Dj1bpfh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0399f14ce6ce90db22201da5006540375c4d4222c1948028e687482c4c9c30e7. 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/0TW1RaVqIcAP5EXexiDT3r.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/0TW1RaVqIcAP5EXexiDT3r.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61425b100423b3b9ad8b07e45b9db2c917c7c128b3d8ac81440854b7bd62ee0b. 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/6FkvF4Umpc8D9t0b6gmM49.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/6FkvF4Umpc8D9t0b6gmM49.
{"copyright_id":"0x315e4321bf192e8756edb4e71f3af7af558fbdabc75dee586c41810fe372cc73","isrc":"CZD551400033","name":"Půjdem Na Jabka Samy","registered_at":"2026-06-18T11:56:24Z","spotify_id":"2vvTIEiYobBFbkEyqupuT5","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315e4321bf192e8756edb4e71f3af7af558fbdabc75dee586c41810fe372cc73. 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/2vvTIEiYobBFbkEyqupuT5.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/2vvTIEiYobBFbkEyqupuT5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af839e78028e6675330347f4fd4b122d2a7eed64d835bb5b90dd8c54df3cbe8. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T20:45:54Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6YAQ89GW19qzZCVcK2qCEG.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/6YAQ89GW19qzZCVcK2qCEG.