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 0x133aadf2b85b5d75f6be178808644bae40d613809a1420bfaed4e02786394fba. 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/0bacc419-ffc5-44ac-b918-c0fd48c40b1a.json and https://artists.proofprofile.net/proofs/artist/0bacc419-ffc5-44ac-b918-c0fd48c40b1a.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 0x99f53ca3778a228ad0fe80ce98505517c7c3a482731ff0a872d822be6cfd879a. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/ES5020400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18119471bb8cb97f401cbdf8d86727102c2971095582e624712cc9b30aa23913. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/ES5020400406.
Despídete del Lago (Las Rarezas de Antonio Luque 1993-2001)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fade284870e13e45ed6768154210a2cd5c698eee49eb5699d2434ce589de790. 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/ES7000607002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3f966872d5632e8776ad2f896999fdebe4948496dc12856ab1d57abd3c82a7. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/ES7000607004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c26f4ade54650c94055b50b787eb3a75b31b19886091d7fc7d34d8bd7337376. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/ES7000808202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb887f8a1c0b9de4c87e5f8a1d3c0ccbc54bdc0a09dc207241377eed4b84e57. 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/ES7000808206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bda6d957c676903c23b16bbe16f23b61b7fb84a439ce719780de63d60f54fcb. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/ES7000808209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2101424557f65644220813456733efc1c5236f60d21bb741a55f3ab8b8e70bdd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES7120310395.
Despídete Del Lago (las Rarezas De Antonio Luque 1993-2001)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36435519f780cb8826c4ac7f5c0749b9ca46f021a210e9a6ed7650bf813e76fe. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/ES7001111503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc605cdb8a3c7ae07e22d5c17a3acc684c72e5410cfb797e50583d30033a9afd4. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/ES7001111507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752d629ddf2f484f68ede27f34dce0ff58f36382999660730e7d0e0eb494e3c5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES66S1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04235e0c058804ad23c7e33d38464bf2e2fc43d8018f0c51174106344a0e0851. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ES7001316502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b9f41a9e9fb8b67dcc6c2b891f886eff2afe7156c8de5d0c7a50ea24f34b7d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES7001316506.
Balones Fuera (Epe's reunidos 1993 - 2002)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1440196eb859a88a74d783de570020d2907ab7e8a11c6f5a0658234cdcd0e1a. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ES7001715106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f1634d47f01d31758093c6af71e3d2671cb0eb167c3023bec67b8adfddcd25. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/ES7001831203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5ebb8937509c7ccf8a339f691ebabab0bcf0ecd3f9758850546ca546def332. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/ES7002039407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33674eb786078a7d8213385b2749f2aa4389fc4614078b1bdaf4c49c0d64bbae. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ES7000607003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f59be50a18bc06908138a0715c9e7c76dde29ada1259167c23badc6cb1128b3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES7002154001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77ede6dead9acd50eac766e816768b41a5ed0844dcf7bb5358758cf98b7a4db. 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/ES7002151101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622c4c8c453074a4933d44b4fb9bfd9fb43faf20f5d757058ca8e081f002148d. 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/ES7002256203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0548ac6d9a4cf55c01e06ad622ed839e1125287cbdd8074c4446db8c63b2932. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ES7002261501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2db3a9af31359133e704dea8b21cb69dcb5bd0acaa3218526f21733f70e5cc. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/ES7002256206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0621fdd50b2e7fe49f656e3fb53b0e6c7fc5185884dfb0ab686bdae0773f9ca. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/ES86F2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d1f5d3e75842736f891dbac490fcfa5e33a65b7c83eb0b0b3eb95670a75e2f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/ES86F2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a0016932a214fe1926cf86a0147dedd4efe4f954cbd936073a997f0ef58cfb. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ES86F2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9e0b144e5053bf5b8ce5b031f72d025a4acb3d500051ace1b3436d09a51c3d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/ES86F2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e9eaa16f3cefd66d4add14738e6d6011d45d6adeaf8ec8ce9c2fb3baef6822. 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/ES86F2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da414386e69f5c2a8d4c6c4339ba85ed2a15cadff2ceddf52c56622b4434142. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZTAU2563422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192f8b9028d6aa29173e288cab1cc6f96212d7ca631978b09d9bf9478c1ed01e. 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/QZTAU2563423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af2a287b66f23708d2d343a79f6d89205902fb90eb2de8e63435659cc0ee7d5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAU2563424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18119471bb8cb97f401cbdf8d86727102c2971095582e624712cc9b30aa23913. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES5020400406.
Nos Vimos en el Psiquiátrico (En Directo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04190d9f15a43de90b6ddcfdc783c8591c85d86e5358abbe35bd8a489f1de3d2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES6171570003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f98d6bd94fe0c58f1fbfd33462c4daaaa0b70002ae31749d7ba32c0c087a428. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/ES6171570004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3e256c167d21d41792fed04da96fa4edbfabc306ce663cb8b747ed66f90ccd. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/ES6171570005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9c00ff8567144970e106533220b1d2bb7b80fa5ed835f1e3c6ff7907c8ea16. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES7002150301.