Las Grecas was a Spanish musical duo of Flamenco - rock formed in 1973 by two romani sisters, Carmela Muñoz Barrull (Valladolid, July 19, 1954), and Edelina Muñoz Barrull (Madrid, February 17, 1957 -
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 0xe3f4c727722cd16a0e9a4b018a9c364400fc0b0809110cf8ecbc44c3bb02874a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4aa7aa8-0be6-4a61-8928-90ab79265d16.json and https://artists.proofprofile.net/proofs/artist/d4aa7aa8-0be6-4a61-8928-90ab79265d16.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 0x982e14a41d3b8ef06321cba536a582ec5279bb00182c8495f2b6b211c5f3bb13. 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/ES5117400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7167b001f2e3de3469849be4fa0b5eb01507f9365f3d4abd6245a7301d43177f. 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/ES5117400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f0575f11e8ec419d87109476936e258754c4b23a8fab44f6ca1a24aa987c5f. 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/ES5117400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb665b789c57511f7aee33739444f37d4cbe21f4db8f576c64ede9145465d6647. 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/ES5117400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebd9ae6d4b032db6d631e2dc98b06531a4934fc28ea9fb403870279192145a6. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/ES5117400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80137852b0ab50d85e142e311a4d91b4812b04e9fda8127e43749e5e22843dee. 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/ES5117400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d48496ba7364a9a834150a84d96409f00d0f0f0bfc61b305dea4ce8ebd1a23. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/ES5117400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f32a10bf996f08cc6091bba4d0b03cd0e32e63d56fefe206f760b037009448a. 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/ES5117400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3ac947d475bf27a2c5fabbc676792e33d2c4f8552e30d4fcca28f695be0764. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/ES5117400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cf31534c4405e0c35265fff4848d9e1a6992273c0906a9c3e52f17f7852e2a. 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/ES5117700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e77404b7ea12df3d19829ae23964b6f23d5a9bf600f0effc2a76b863f8c552. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ES5117700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c3a46911ab544aae77ed641395ec935f666a732d2d091793d60f0d10944c7f. 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/ES5117500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bef72ebeb789c276f19df1ae230e4844a02d0738298a84da88e004044e236a. 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/ES5620902889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ccb86dbd2b695fd5697ef97734e30ee4a9cd285c10d9762865d191b10a3ac1. 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/ES5620902890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca40684933b642d517f6942a5327f4281ca1f4296c6f1eb1c978c5ee4dfaf81. 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/ES5620902893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf67ee12bc5106b7e1efc8a43611b56385b417c5f01429a1cca8fcb3bea6c043. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/ES5620902895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6892b07a3c45803208789e050be899f3d29e570ee37355952861ae022ada49. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES5620902896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd569a2d403bc45001503f49f69d1029f6e635e87eebbe77cb24aa651d23fe16. 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/ES5620902899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcc4d9167332a80810f5c02bf7a6b0bb2c1e8d901255634b0ecae9baa59a313. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ES5620050271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e4d4b626758793a909e127ee71dc74a3805e2d61012166fe3d0545ea73375d. 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/ES5620050272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982e14a41d3b8ef06321cba536a582ec5279bb00182c8495f2b6b211c5f3bb13. 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/ES5117400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982e14a41d3b8ef06321cba536a582ec5279bb00182c8495f2b6b211c5f3bb13. 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/ES5117400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b34061cfcf105e93d1e47db073621cf1b8857eea59e530068530cc14168b4a. 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/ES5117600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ed5228aa5c715ef674e2e1575f447a02cc961414cae3460548f705bb346aee. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ES5020900876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3ac947d475bf27a2c5fabbc676792e33d2c4f8552e30d4fcca28f695be0764. 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/ES5117400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471d936ef36bf005ce485f2545644de94e42d2bab179f7d772b6bed230432dd3. 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/ES5117700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7464903eec86ad6e465337f1f3f9276786a01d8e9ba0d62bed55228e8598c0b4. 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/ES5117500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c3a46911ab544aae77ed641395ec935f666a732d2d091793d60f0d10944c7f. 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/ES5117500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e77404b7ea12df3d19829ae23964b6f23d5a9bf600f0effc2a76b863f8c552. 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/ES5117700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9814ca8f8f7b22a8ce61fdf172c300e9f514d6e9c9d4fb64bd8751a015711b1b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES6100921511.
Te Estoy Amando Locamente - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964c5aaf12b3e91ad21f16864c5bdd09a9331ae22ad55ded1e04d69b10f73681. 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/ES5021700042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964c5aaf12b3e91ad21f16864c5bdd09a9331ae22ad55ded1e04d69b10f73681. 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/ES5021700042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964c5aaf12b3e91ad21f16864c5bdd09a9331ae22ad55ded1e04d69b10f73681. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES5021700042.
Cuentame Como Paso - La Generacion De Los 70
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982e14a41d3b8ef06321cba536a582ec5279bb00182c8495f2b6b211c5f3bb13. 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/ES5117400004.
La Morena de Mi Barrio (feat. Sonsonete, Requiebros, Las Grecas y Rumba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065a7d062d642a2f66bbafac75db228f68970fc50e8d939df1b466ffb7c4752f. 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/ES01G1201560.
Viva la Rumba (feat. Los Chunguitos, Sombra y Luz, Bordon 4, Los Chichos, Los Chavis, Junco, Las Grecas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5eca080c9421a4b83673cd48e76424583618728dd3f2804ad60ba4bbf09cf5. 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/ES01G1201314.