The Lecuona Cuban Boys (Spanish: Muchachos cubanos de Lecuona) was a popular Cuban orchestra which toured the world for over forty years. The band was founded by Ernesto Lecuona, whose role was that
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 0x6bff46ce28a0984f22daf2200eacf0c16e7453ddea5e2e2155a41933fc2cfa76. 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/a8d96a9e-a2a1-4d88-bcc1-4b168ff51091.json and https://artists.proofprofile.net/proofs/artist/a8d96a9e-a2a1-4d88-bcc1-4b168ff51091.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Congas And Rumbas From The Unforgettable Band
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466336559d582f5ba44d1396111cdc5e1cae6ce70b8ceec341de4eeb64e1e830. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USR010611386.
Latin Legends: Lecuona Cuban Boys (Remastered)
Beyond Patina Jazz Masters: Lecuona Cuban Boys
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0a91262999c50359d703fde971bf5ecfc6e6cd7c39c2783db51f638036ff02. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QM6N21456537.
Musical Moments to Remember – Leuconia Cuban Boys: Rumba International! (Remastered 2015)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4755dbb2cfbe6a0ebb32368c684ceace0060fea9cb2db51b302b4f507d7db7e3. 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/QZ5FN1817265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd06383a3c60ab794230ed4b312027a98807261e4db2db46cf216b3a3db2c02. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZ5FN1817275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd527bd1a67bc1aa6668d12d36da8524d46228920c03e5484f4bc8751a1a4dfc7. 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/QZ5FN1817283.
Les idoles de la musique cubaine : Lecuona Cuban Boys, Vol. 2 (Les années 1960)
Les idoles de la musique cubaine : Lecuona Cuban Boys, Vol. 1 (Les années 1930)
Lo mejor de Lecuona Cuban Boys (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5b60035b01d2e1a7c7ad077e0c4921a6f03a1388202baf8b598153ab42baf4. 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/CA5KR1967610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ed4e3b534b213667bc3771450a5c57a3b62a6498260708e3fecd843e428716. 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/CA5KR1967614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf04696da5f9d3e1390e8019f4d3448f1093c5b28134a88fd36c986ea808685b. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/CA5KR1967615.
Classics from the Master Tapes 1935 - 1938
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5597caa0952437de625819c533826625b00fe98ebb97742ba5c26f6ed8b96e8e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ES58A2300667.
Ritmo Cubano Collection (Audiophile Edition)
Essential Classics, Vol. 820: Lecuona Cuban Boys
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cceaf287b1e1f15df7685182f570134cf2f887f1d1b154834405b4f8555ef62. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBKPL2098688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4759e5f0faf2f9af02bef8da4c0bba14a9408506606279e06a1e73f26e88787d. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/FR4HR1804342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f805e8a79e1a8ef6889ebf29412d9eeeb0d0d2943320f8aef2b55e686830fa. 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/FR4HR1804315.