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 0x92043b49da29b5764473bd03474a7d84eb368ab3ad6e33706f845e5108a624ce. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91d1b45b-81c9-46bb-983f-d96cad70f2de.json and https://artists.proofprofile.net/proofs/artist/91d1b45b-81c9-46bb-983f-d96cad70f2de.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xc9dcc70835c54778232a024c4d7bc904c4a443fa616caddc1c89ce4c1f5f6f29","isrc":"SE6XW2285900","name":"3 Pílulas","registered_at":"2026-06-21T12:21:18Z","spotify_id":"6BCCuMIEUk9OxQtVDpqyQm","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 0xc9dcc70835c54778232a024c4d7bc904c4a443fa616caddc1c89ce4c1f5f6f29. 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/6BCCuMIEUk9OxQtVDpqyQm.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/6BCCuMIEUk9OxQtVDpqyQm.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d3938d220dca59cda221c19e86136afbee8ccfc204124c110c0025b4184527. 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/3hUkheu8rk62KZA9vwkx8O.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/3hUkheu8rk62KZA9vwkx8O.
{"copyright_id":"0x87e8802f194b2a53a24392dceaf3ebcf99b03ea2b2d01eee5e83e9b3c23d2dfc","isrc":"QZGLS2065749","name":"Mais um Coração Quebrado","registered_at":"2026-06-08T06:13:37Z","spotify_id":"6L2oeBYhA6MQxZpgKuxAV9","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e8802f194b2a53a24392dceaf3ebcf99b03ea2b2d01eee5e83e9b3c23d2dfc. 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/6L2oeBYhA6MQxZpgKuxAV9.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/6L2oeBYhA6MQxZpgKuxAV9.
{"copyright_id":"0x94987a70c4c9b9f8ff2ebbb93aa85da455bd262ebf2495a59151a18d480ff058","isrc":"QZGLS2065750","name":"Te Amar Dói","registered_at":"2026-06-06T19:51:36Z","spotify_id":"0knVcTXTqRHHDgDpZqyW5a","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94987a70c4c9b9f8ff2ebbb93aa85da455bd262ebf2495a59151a18d480ff058. 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/0knVcTXTqRHHDgDpZqyW5a.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/0knVcTXTqRHHDgDpZqyW5a.
{"copyright_id":"0x1fe6ba63115cf92fe769aae390f40355dab5b8be8a34e9835e230ed6f2548133","isrc":"QZGLS2065751","name":"Noites Sem Dormir","registered_at":"2026-06-10T22:11:19Z","spotify_id":"08vFVyMH25rYXJfd2Mq0QI","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe6ba63115cf92fe769aae390f40355dab5b8be8a34e9835e230ed6f2548133. 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/08vFVyMH25rYXJfd2Mq0QI.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/08vFVyMH25rYXJfd2Mq0QI.
{"copyright_id":"0xe0fd95f87baaa68a8d55a463bda50a5eb209066dc7fb30aba35f6ace432bff3b","isrc":"QZGLS2065752","name":"Seu Amor Morreu","registered_at":"2026-06-09T05:21:39Z","spotify_id":"0sistuhOfwUjcDpJgpZQc9","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fd95f87baaa68a8d55a463bda50a5eb209066dc7fb30aba35f6ace432bff3b. 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/0sistuhOfwUjcDpJgpZQc9.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/0sistuhOfwUjcDpJgpZQc9.
{"copyright_id":"0x453c599472eae265a31d55a76a2a50c0ca6b7fce12561ca4da937e2d75fd17f8","isrc":"QZGLS2065753","name":"Me da Teu Amor","registered_at":"2026-06-20T01:14:05Z","spotify_id":"2IKRDsZs1EI8ougCx4JwbX","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453c599472eae265a31d55a76a2a50c0ca6b7fce12561ca4da937e2d75fd17f8. 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/2IKRDsZs1EI8ougCx4JwbX.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/2IKRDsZs1EI8ougCx4JwbX.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f53065cc99e1ecb06c6b7b0fe8b54a79a158d0c4e0a97bdd95bb99264f66b5b. 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/5I4gTOpvnO1l1WtklB6uxf.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/5I4gTOpvnO1l1WtklB6uxf.
{"copyright_id":"0x23aa9ffb48f10370ccf214e686cecd6a7bedf8c64d861ac80c08afd8e406ad36","isrc":"QZGLS2065755","name":"Vem Aqui","registered_at":"2026-06-23T20:33:34Z","spotify_id":"3EY4u8omsHrQakilNSZRAP","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23aa9ffb48f10370ccf214e686cecd6a7bedf8c64d861ac80c08afd8e406ad36. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3EY4u8omsHrQakilNSZRAP.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/3EY4u8omsHrQakilNSZRAP.
{"copyright_id":"0x00d70abb25d806913038a0da4de509a9ab1c0a06cacd4397e6fb1c81cc09ec0a","isrc":"QZGLS2065756","name":"Quem Vai Me Salvar?","registered_at":"2026-06-09T21:11:41Z","spotify_id":"5rUFUqQnaOnlIrZe3z7qfi","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d70abb25d806913038a0da4de509a9ab1c0a06cacd4397e6fb1c81cc09ec0a. 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/5rUFUqQnaOnlIrZe3z7qfi.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/5rUFUqQnaOnlIrZe3z7qfi.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46b4b7447b56452b6962026ad7309250ef90bb1030546afbaf9479a60f4f589. 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/5B3Nrg2UYDiyxYYYDNnm0x.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/5B3Nrg2UYDiyxYYYDNnm0x.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1943800bbce3268e6d6ab633f4f8f63c66361737b9c63db5905e2dc2562e184c. 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/1l7l5KWL8Q4IvkIEaRSGO2.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/1l7l5KWL8Q4IvkIEaRSGO2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7aee2f259bd829a62522b1a744a4c693a53d3d7b13e1452af9f332c40fc0e34. 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/7Dsyshf9FUJHAExtAiaQbb.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/7Dsyshf9FUJHAExtAiaQbb.
{"copyright_id":"0x7796bdd0f905e32adcb8863b669e82258e1e0d4aab578ec7c3305ba89f6d964e","isrc":"US7VG1810155","name":"Isso Me Lembra Ela","registered_at":"2026-06-08T06:54:59Z","spotify_id":"5mGCUuxJsagfvZGIRGHtHz","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7796bdd0f905e32adcb8863b669e82258e1e0d4aab578ec7c3305ba89f6d964e. 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/5mGCUuxJsagfvZGIRGHtHz.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/5mGCUuxJsagfvZGIRGHtHz.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300e5dc8e3aff5ec443f50577c63f2870f3799988e6eb991520465b7d5d3b15e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0XVdRp9m3q8QOwszFRL7Ys.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/0XVdRp9m3q8QOwszFRL7Ys.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb1ea7bb497561ed44682c94c411db7bc8373c21ab25f08f1fd74043351f423. 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/23qdSQ24NRRkIxGBTPssQ5.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/23qdSQ24NRRkIxGBTPssQ5.
{"copyright_id":"0xe414a32047951d0b65ab5d9aa575d96bd63bc0d90aafb56ebfdb052c24f6ea63","isrc":"US7VG1810160","name":"Te Amo e Te Odeio","registered_at":"2026-06-08T15:32:24Z","spotify_id":"7JfGpcusBNwFL7Whxf0uHr","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe414a32047951d0b65ab5d9aa575d96bd63bc0d90aafb56ebfdb052c24f6ea63. 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/7JfGpcusBNwFL7Whxf0uHr.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/7JfGpcusBNwFL7Whxf0uHr.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648d0a9b95ef78e2581a91affe73425479e43fc1ab588ef70101320cd45ddf00. 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/1RO7OSE66m8uSoAMxTqph9.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/1RO7OSE66m8uSoAMxTqph9.
{"copyright_id":"0x5e324ea568d4ef331f052bfc550c212c7adb10e78308e0ee3e2b8bfacd1db241","isrc":"US7VG1810163","name":"Ainda Sinto Sua Falta","registered_at":"2026-06-26T04:08:51Z","spotify_id":"3ueB6pr754fWF0eJMzI2zj","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e324ea568d4ef331f052bfc550c212c7adb10e78308e0ee3e2b8bfacd1db241. 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/3ueB6pr754fWF0eJMzI2zj.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/3ueB6pr754fWF0eJMzI2zj.
{"copyright_id":"0xed5879ab94ece675767c9ea2ff73ecc95d272018daa04c4d4d1a9d314186caa3","isrc":"US7VG1810166","name":"Odeio Pensar Nela","registered_at":"2026-06-22T21:13:05Z","spotify_id":"03KAPcSDFVaulTYGebn2RD","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5879ab94ece675767c9ea2ff73ecc95d272018daa04c4d4d1a9d314186caa3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/03KAPcSDFVaulTYGebn2RD.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/03KAPcSDFVaulTYGebn2RD.
{"copyright_id":"0xc9dcc70835c54778232a024c4d7bc904c4a443fa616caddc1c89ce4c1f5f6f29","isrc":"SE6XW2285900","name":"3 Pílulas","registered_at":"2026-06-21T12:21:18Z","spotify_id":"0MMgVWClPDzXJP4eBoJAvV","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dcc70835c54778232a024c4d7bc904c4a443fa616caddc1c89ce4c1f5f6f29. 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/0MMgVWClPDzXJP4eBoJAvV.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/0MMgVWClPDzXJP4eBoJAvV.
{"copyright_id":"0xb0be13a87b8286e4ce38ff20229771ed3d2f4e69e2864c961fda31f785fbfffe","isrc":"US7VG1813289","name":"Se Quiser Amar","registered_at":"2026-06-09T21:23:30Z","spotify_id":"0ElxJTccvp0dM4xHoOOhKZ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0be13a87b8286e4ce38ff20229771ed3d2f4e69e2864c961fda31f785fbfffe. 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/0ElxJTccvp0dM4xHoOOhKZ.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/0ElxJTccvp0dM4xHoOOhKZ.