Leño was a Spanish hard rock band created in 1978 in Madrid. The band members were Rosendo Mercado as guitarist and vocalist, Chiqui Mariscal as bassist and Ramiro Penas on drums. When they started t
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c25f25d07212ef7b072c3898c58c269f00fe1b139d22bc44d0ab844f6fad7a3. 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/f9b77831-6762-49c6-90dd-4861e87fe85c.json and https://artists.proofprofile.net/proofs/artist/f9b77831-6762-49c6-90dd-4861e87fe85c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010013af50df9d134cd1c425e4214afc5afa9f1d3bf65ef8c6831d3290b07a58. 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/ES5107900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea58d0068bebe6220bee0460ee9d4e9c7eaced0ab933f3251307a594bd1611af. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES5108000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb6319b55d7c9e62e3487d99cbcb0f36fb3a6cd5a4d36bc129e11aeda88c5e2. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:14:51Z), 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/ES5108000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5058d560e0d19ce7423ff03eeef03703a2f2b5277eb916c3038a2ecd4c5f05. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/ES5108000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff9d631a1bea946d43d9f4467063ed66444099c8864d304daf4e5b1feb1d2f3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES5108000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d2c724e8ffe0351da09e7bc7afc2a7d865ab7f09f825320f7213523716f652. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:58:32Z), 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/ES5108000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ca7c5fcf8cbb65653463fa76bfe237d519c73a33a5c81dab7be7f44670b3bd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES5108100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384eb96f499d79dc4a203fc4cd6fc44214bcc17d49698bc6ca003952ed8af92f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES5108100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd36faaddcdd05b7eb0efd1fb17bbc2dee7919562b7f2f13f2b3d629419fe292. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ES5108100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb15710b84704c77c7791c33471ebe1d49fc9208dc72cebbbfb98152fed29daf. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ES5108100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc704963fe8c28a312e839ae8f4eba8f5d4052584f960a606d05cda2fecd65a8c. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ES5108100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622460222af5f68885e5e0a3d7c243c02965bf4ed0e6ebf61c808d217cfcbc79. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ES5108100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887f9e35b297354d1c168cb833906d03931bae5ef4132933dbc625a6a28a6c6e. 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/ES5108100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984a95dab57d8ad805f0fb16217bc390d65062d388f846d784291c4431f13555. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ES5108200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7428649484f61ce1d5a1976709bd70cf5992bc3bf42f2ce4e39d244b15b2d82. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ES5107900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60134f1e064c2944bf2aedca00708a6b3a1f641cd877955620080631239367a. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/ES5107900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f4aae011d974e46d2d090f70555d588e192c1c843c1c3f764c6f47eacef67c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ES5107900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b065042b0dc6b69c002c9442644d8b395ca726a3cec41356181119f6cb93c13. 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/ES5107900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2153a9152c82378b7e1828a7acc69128ffd56ef06f0506b2b6287e38a31a4839. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ES5108000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a86111b34f9eeaefb17ce72739c9869ef193cd874ed112b4508d3dc630e37b. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:58:10Z), 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/ES5108000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08454e9d74c705cd1cd3fd3be24846be8e4585bc1eefe3c64b2a9d85a0502be. 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/ES5108000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5df9444b452ff593cdebed7c7b350a2ac9c21918e362a5e0043e972febacf20. 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/ES5108000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff9d631a1bea946d43d9f4467063ed66444099c8864d304daf4e5b1feb1d2f3. 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/ES5108000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46290924bfe20aa434391fcaff55bf7c6f85a526f1ab8dad83ee43a42e52b42. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES5108000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc704963fe8c28a312e839ae8f4eba8f5d4052584f960a606d05cda2fecd65a8c. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/ES5108100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4e1111e854b1eb4f239d9b7e31e97f6c91f2511dea427e2a7e210a5f664b96. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/ES5108200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe4fd3e7d8d64fdeb086da6186f8b4e626b2f3c606b65b046546ccab212f3c0. 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/ES5108200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1eeca2ec3c9b84a9e43f57778325d56fcf2f711e474184877e9c0222cc6a01. 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/ES5108200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe905e84a7ea9866998b475e4015d4c33f8eca7d55d520ef8c8c887d2c6fba922. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ES5108200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4d9f738c71092b93507b8212d81209bd731cff9f24728652ddf37b345f2afc. 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/ES5108200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60134f1e064c2944bf2aedca00708a6b3a1f641cd877955620080631239367a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:53:41Z), 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/ES5107900022.
Solos (Improvisacion instrumental) (Directo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce32c9c8c34803700847ad7c1ab1fe1ea9055d50fc9bcd2142ab83a4ed8632a0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES5028300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc704963fe8c28a312e839ae8f4eba8f5d4052584f960a606d05cda2fecd65a8c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES5108100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe4fd3e7d8d64fdeb086da6186f8b4e626b2f3c606b65b046546ccab212f3c0. 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/ES5108200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1e1ac29998adbf765c9dde6dd26c83b3646724fc6241895c266a7abb0f8931. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:31:30Z), 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/ES5108100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622460222af5f68885e5e0a3d7c243c02965bf4ed0e6ebf61c808d217cfcbc79. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5108100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4574ddd1619cdde81a575e4c90a25f4bba751adc9c7236878d4e1dd314b5c22. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRSME6800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa5ddfb5c643b5ecbf4e151f67ff44a8cacf62fe4eb82e4c330eed230c9042f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES5108100132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa5ddfb5c643b5ecbf4e151f67ff44a8cacf62fe4eb82e4c330eed230c9042f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES5108100132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5df9444b452ff593cdebed7c7b350a2ac9c21918e362a5e0043e972febacf20. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5108000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de99e8417a050ce82c17938887f44763daa34fd1e61682cbebde6cee1fc7c00. 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/BRUM70800626.