Los Machucambos was a music band formed in Paris in 1959. The two guitar players were Rafael Gayoso (from Spain), Milton Zapata (from Peru) and the singer was Julia Cortés (from Costa Rica) . In 1960
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 0xf743d667743f6c00f35032d948e947f2803f87d06d3b9a29d41b1a8910d38c75. 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/fe0de6aa-2a64-4a2c-a3f6-a408039f9db7.json and https://artists.proofprofile.net/proofs/artist/fe0de6aa-2a64-4a2c-a3f6-a408039f9db7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vintage World Nº 41 - EPs Collectors "Felicidade"
Vintage World Nº 61 - EPs Collectors, "Poncho De 4 Colores""
Orfeu Negro: La chanson d'Orphée / Adieu tristesse (Mono Version)
La Bamba / Duerme Negrito (Mono Version)
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 0x21402bdb38f56c91d168f082c7bf8656116af535134502d589d75cc6340effc1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEUE12392467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fc37dc89f764b9d2628b0e050a073c4341c3d6476d0506a25b7bd2ddc88f1f. 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/DEUE12392468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece378d580fe97cbf0b577cc5a68da8d54e709849844259a59f8793e5f0c0b34. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEUE12392469.
Vintage World Nº 82 - EPs Collectors, "Duerme Negrito"
La Petenera / Recuerdos de Ipacaray (Mono version)
Os Bandeirantes (Original Motion Picture Soundtrack, Mono Version)
Pepito / Dimelo en Septiembre (Mono Version)
La Boa / Otorrino Laringologo (Mono Version)
Aquella Rosa / Otorrino Laringologo (Mono Version)
La Cucaracha / Contigo en la Distancia (Mono Version)
Dansez avec les Machucambos (Mono version)
Tabou / Samba de uma Nota So (Mono Version)
Purito / El Silbido de Ese Tren (Mono Version)
Chico Cha Cha Cha / Teresita (Mono Version)
Cuando Calienta el Sol / Esperanza (Mono Version)
Dansez avec Los Machucambos - No. 2 (Mono Version)
Dansez avec les Machucambos, Vol. 2 (Stereo Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abeefe4f4e6fad5bc85ee7067d1b437c83eab6bae9be30140888c30f78c00ec. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/GBHCD1711571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc560062d0bfbe327b4c8fba964736304748dfbd1982039343f2757c6bb6280c9. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ES71G2111385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647ce0489577de15d3c0472d69480953969aeb995e1b0b0efa8f5ff4d09ae3f9. 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/ES71G2111386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082e916c81bb88b4f4fe22e2bee8aad6a461ec9941a9384f19bae8fbde35ecc2. 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/ES71G2111391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bb7e0feb275adf086fe2b260390d4815212941eb1b784e6d3a1cdbe6c0d9de. 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/FRY510778216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2112af66d4e4b33efc32d10438f0c40bd803a7f375a038174b8f2c1a305c69b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FRY510778221.
Caminos de Libertad - Chansons libertaires d'Amérique Latine
The Very Best of Los Machucambos: Pepito
7 merveilles de la musique: Los Machucambos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7594c7465214614aeb435ef849ced8b0e151383727eeef2d631f72487396cde. 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/FRM031231830.
Los Machucambos chantent leurs grands succès (Les plus grandes chansons de l'époque)
15 Essentials of Los Machucambos (Mono Version)
35 Essentials of Los Machucambos (Mono Version)
La Bamba and More Classic Hits from Los Machucambos
Perfidia & More Classic Hits from Los Machucambos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4af649d4ad85f20f4d8a95c8730eebe8eb41f6204463c8b50fcaa1d475d7200. 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/ES5621600039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c3992c699540c8b069ee82d1af4e8f92bb1d47147924253d0ba2d91c67c87b. 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/DEUD91898697.
Latinos de Paris - Cha Cha Cha Avec Los Machucambos
Exotic Latin Sounds & Rhythms - Los Machucambos' Tropical Classics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d20e59e3207b80af7d342cf03271ccf4541f240146220469b304446857fafc. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FRY400200060.
Les enfants de la guerre - Live à l'Olympia, Paris / 1972
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983a9109641a625baa146db4ce030781218217aebc7e7f5b167236e35a1b9ae9. 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/FRUM72202260.
Quién (Qui ?) - Live à l'Olympia, Paris / 1972
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02aa5ab2160cca2c49018c8d92ed997cae7d1b0583a52b53a64d75a6d6e40b2. 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/FRUM72202261.