Libertad Lamarque Bouza (; 24 November 1908 – 12 December 2000) was an Argentine and Mexican actress and singer, became one of the most iconic stars of the Golden Age of cinema in both Argentina and M
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 0xeed4b95f1addcab6706a26522e9a76fa4ec0ea4074974672929759edce9c2b5d. 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/933142d7-5c07-4326-9ccf-71ed7d3e723c.json and https://artists.proofprofile.net/proofs/artist/933142d7-5c07-4326-9ccf-71ed7d3e723c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vintage Tango Nº 16 - EPs Collectors "Y Todavía Te Quiero"
Vintage World Nº 67 - EPs Collectors, "Te Sigo Esperando""
Los Tangos de Agustín Lara Con Libertad Lamarque
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 0x534484f4633c4e2d250df09299a8dae5adbf98cb5fcd9fd501f29c868bc39480. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:47:33Z), 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/ARF039401098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2a687ef96aed54672b76c5d988211e2d10782974956b64ac7232539856464b. 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/MXF010001078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1627e350bc7cc069a7a2803789c74756f1b9b289a1f3f4b12e1b4a024bda801. 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/MXF019501033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b81ec4708f303ceb7c51bf46029950858eb2d784a592dc3f94ac6e5aa84f14b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USR010613180.
Tesoros De Coleccion - Libertad Lamarque
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be066320de138a20a57e8bd961de827ef68be5fa6e4474e86f0ebcbd4d49366. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/MXF010001075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca04cd647d3a6a8939ac469ab52a2f8cdf696c6dc2908457282696ba24bb4e3c. 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/MXF019501021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee3284d9bece0090942c4b58c733be793417c762e5a87882e3b9deda4d89562. 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/MXF010100272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eaebd849e7e9a05c5c23af51e7935ef26372826531f16c2b07a840bc1eeb5f0. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:43:34Z), 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/MXF019601504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4aaa8cdc58706ba2ffe7c7f722cb84130f53ed9e935b92e985b19f64b6e028c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:51:05Z), 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/MXF010001074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908cbff2ccce7e000dcf994c85dd291e3d7c4da9e7b3b9fc707874425ce7d550. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/MXF010100271.
The History of Tango / Libertad Lamarque, Volume 1 / Recordings 1945 - 1958
The History of Tango / Libertad Lamarque, Vol. 3 / Recordings 1945 - 1958
The History of Tango / Libertad Lamarque, Vol. 2 / Recordings 1945 - 1958
"Serie All Stars Music" Nº 042 Digitally remastered "Libertad Lamarque" "La Novia De América
Libertad Lamarque Sings Songs By Maria Grever
Libertad Lamarque Canta Canciones De Maria Grever
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1187b3828aedd000d7ec1c54f908d21fbedb79c7fc5975ce4bd0f99a5e3488. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/MXF018200263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf588a06bd2c7f4fbf16aa0de14b95f28ddc51cbaf9aaff2c8f79de280bcdcc3c. 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/MXF018200264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07c5506005d2f8f6bb44efe9a8ad0d440db07f12bd605d4cfd49bf248f4f095. 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/MXF019901180.
Libertad Lamarque. 20 Canciones Originales
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeee2df89fc0ed262e22d99af606a6b90e889bab2a71cbdfc3664b02bd016884. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/MXF016100409.
Libertad Lamarque Canta los Tangos de Agustín Lara
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bfe017b29db92a6c5e1aa50c20e25728191e57c9674ad2395a56f664a10afd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMDA71363004.
15 Tangos Inmortales a la Manera de Libertad Lamarque (Versiones Originales)
Páginas Inolvidables - Versiones Originales
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2f2b79585a9c570b45f4cf5da4d6a801609fbb5af9290c90ab02b89f98650f. 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/MXF015900133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e53c73eaaa2b92f5c76d5f617ea75bb041e62deab989995231560b39795591. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:52:52Z), 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/ES6601501864.
Tangos Inmortales de Libertad Lamarque (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecd1399c7f35180a89782d11cb0bfa663973dc84c4214be74f178de1742c750. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES6601601717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917ed332914f84dcbbf706f097a6e58626a7c7e5454014b0cc86a9d18bbdb901. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES6601601718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2006ccaf60ddb62883475234ae379ae4cd171a82d3fa9d5b0cba2f8d46a5e36. 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/ES6601601720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e873ec6816b49e94608bd52a3eae895d918fa43e867cd6c8c0878681c2bb83e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ES6601601722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0499a3db7fdeab161e5c130627809387ae74f475c53aef3885b57ee70cd0d9a6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES6601601725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe099d7962d7fbd436b3e54ec9dd50c4b80fbce6b02e8e3f50febcfc46d554786. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES6601601727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d34b27950e43bcfc6b1b61aa09adfc9fc41e73b7c22611afeb6b918b7bef0d. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:08:27Z), 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/ES6601601728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835c7fc2fca088bf07bd1000f5d37e363024bfc771021141db8596e1ebb33102. 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/QM6N21809262.
Aquellas Canciones de Libertad Lamarque (Tango)
La Novia de America - Libertad Lamarque Canta Agustín Lara
Tangos Inolvidables (2023 Remastered Version)
Recordando a Libertad Lamarque Y Rosanna Falasca
Tesoros de Colección - Las Estrellas de la Hora Azul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56fe24ca6158a1c20755490c0441ac5ab805379dd13e489d6c8cd70efa0fb14. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/MXF010100284.