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 0x6f7eee7e1580f619718b640a78e900d2dacb11491470f1e07a8b09b57d623dd9. 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/f204ba2b-4d7d-402d-8734-1902283d4311.json and https://artists.proofprofile.net/proofs/artist/f204ba2b-4d7d-402d-8734-1902283d4311.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 0x23d73c19866cbc642a48e0a162f53feddf3305b36dd143692d5fcbf0e5db07ce. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/BR3CN1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef43931c3462819d37cac5b1ff2c2aeec955e0b7611e485d2788204d6830849a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BR3CN1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f4c6fbe10f9cdc8c5704c4c7bf5533a5226c3fa45de1fcb21289c6f962f236. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BR3CN1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23be30a0be35a1f2b556244aa3fb658cd2a196a6043dda25cb4249dc0d6c68dd. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/BR3CN1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a31e47ae44ba79abda3aa0a994ef6ec4e416b7cf8dc5831494ea5c59f6301f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/BR3CN1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb0e4afd41fff701323cb89a4a140bc0e6f20a0f6df4a1aeddefcd26247c9c4. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/BR3CN1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7942c6d0c4f08520b66f491741eb9477fab38976649845f33cd7ca364d74c7. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/BR3CN1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bcb6399f177173888aa2c4b77d3740a1bc6bcc9804cd198319a0e0fd4e875c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/BR3CN1800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c68a50428df65fa9bf44c3a47c848c0d2ad1092cdd09e66298822c37aff486c. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/BR3CN1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93b7bda741dc66e6577354b7d0ca1d36def1e2c6d12e6f66e9723ed85d9f24a. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/BR3CN1800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a153c5766d50686a75703afb0f687d8a420826581644ad1964a8bb0917fa86. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BR3CN1800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0ac795a6a22c3c1467c1f86a2a95aef02f4f6ccc7739ba83b4c188750e1f9b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BR3CN1800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1549c71970e746ae9f90ed42a814fb409c214cd65ec0e8100bcec1fee4f7993. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BR3CN1800046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674aabe96f5526650b4712226cd187570b776879a4abc321b44a1beafe4652b4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BR3CN1800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aada2c9657fe070b00a78283b857c1c62ef888c67038bd82d560c294b83b2d7. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/BR3CN1800051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccfed1b4fbb09ec1c7ececae42f5f77ad403e945434a23cfcaecfded3234857. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/BR3CN1800084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2978310cf10cf3b244a517b5c86c68cfaa29f6d4259c82eca6c7a7476985ee. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BR3CN1800086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2252508372033adbe9a53e2acc3517d8cb710f4dbfaa9b4177db54c3659cf6b2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BR3CN1800088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe949a2a038a95cb91c5ee3505eb4ee2ce2c2a2a282cbd2f154d1ae0851e7bd9c. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/BR3CN1800089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38dcff1e6413b308752e3e0551ad8f944f85a52199ac34bd77f1bcb164aade5. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/BR3CN1800090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9f1645bc8259bd094ebd35db959ade0f08ff42510b585fa61a97b66d369cc0. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/BR3CN1800091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c49c63fefcb648336253de3b7cd8012897c71b8d87529cd19057fc6a9b91b8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/BR3CN1800092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fecbad0b0e7424f16109229cbae629ef1968b0c90353fb5fbb330129b728e1. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/BR3CN1800093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b37a87ebfc25e6aa6560aae2c0530190fb8071e12a4856dc57c412a8a97171f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BR3CN1800096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096158e743ff3b3309766388216df3f38c143abfe1b4dd5640f7082f142bd1a9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/BR3CN1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78e506c97947967aafebad35e9267f19cd2c886f8eb3378f2116d1a3528b613. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BR3CN2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22bbacaf40837862ec569fa120b3282417a2feaf6d546e62aa60c7c5ea49fe8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BR3CN2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e3b050951f116c3ed642a8f75b6dcf6c45b7a27a7ce8280432c223f9106736. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/BR3CN2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5811ce56a5b6992426a7f28a44d2048eff947c1e792a6cf567f62e1f52f9e3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BR3CN2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee5896c61d9164f3917e0fdb36aaf662cd25c89fbbb3e3a5c336f21022d6886. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/BR3CN2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1538471bbb73a229eb31f0aab987906e05d357aa94fb2c40145ed25b13259d03. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BR3CN2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f6b87bdafc177f22bbb8cad08a71414d87d1ac1a3e8cf90114946fbecb9ff5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BR3CN2200021.
G.E. Leôncio de Albuquerque Coleção Paz e Alegria, Vol. 1
G.E. Leôncio de Albuquerque Coleção Paz e Alegria, Vol. 2
G.E. Leôncio de Albuquerque Coleção Paz e Alegria, Vol. 3
G.E. Leôncio de Albuquerque Coleção Paz e Alegria Vol. 4
G.E. Leôncio de Albuquerque Coleção Paz e Alegria Vol. 5
G.E. Leôncio de Albuquerque Coleção Paz e Alegria Vol. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2487c2a840e3a828b7955422e2019e3461bf6201261e94e7ee856aa61877ad22. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/BR3CN2300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bf56a637f9802e8df7b097a308f7cbb092be19c149dac1c2ac615b0f01f4a6. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/BR3CN2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e138b7875d56d9ffc7a7ab5282dddf4f37d7a2b69aa7900708579ae953482c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BR3CN2300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e20e74ba41395b02ce2a7fa32234286be2422d32a8092d8100cd54e57cfaabb. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/BR3CN2300071.