Francisco Amat Rodríguez (born April 22, 1950), better known as Pancho Amat, is a Cuban musician specialized in the tres. In 1971, he became a founding member of Manguaré, which would become one of th
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 0xefdbbbe14f3cfea5b15fcd82be0aca4b26a00d748948a8d3debdd6dbcd739fd1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/514d7259-76ba-45b1-8159-82435aa4d8e7.json and https://artists.proofprofile.net/proofs/artist/514d7259-76ba-45b1-8159-82435aa4d8e7.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 0x67e1fe8ba3c7c3a758879d8a49b50793de68b93b87c9013432275669dcc5bfb0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES5021601482.
El Tren de la Vida: Homenaje a Faustino Oramas "El Guayabero"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965dbe15ecf5fce493999eab75223fa5f99ae5a4ebfd20d516f822853bb8f533. 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/CUA021712149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522b9478bfef751651df071272253baa015ce9fe06fc3a4b90c0634f37098674. 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/USNRD0910109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50e773ce8e3405abb3e767c4c75d59f405d425d3725e28ca85fa17aa8860509. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES5300510001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d892a156a59d9c4cfceff4335313797b11d18462a04db3db5c1b2e7853039f6. 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/ESA011637295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50e773ce8e3405abb3e767c4c75d59f405d425d3725e28ca85fa17aa8860509. 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/ES5300510001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39a6b6705c8be7e20d4f1d3dce8781a67a675aa261e8703889faeeb4d8d579b. 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/CUA022114983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa6ecc8e85466db94eb38a968c44a5ddb9763824142e9f15c71e1c2f61a9374. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TX1967680.
Rumba con swing. Re-creaciones de Chano Pozo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0e12ae656f73e4f38296c0b4146c751dcb54b1594698c3d481e2364078f70f. 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/GBMA22571354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0faa4923e22bd99c7aa5db410725c2f9acd0d49ea41953f5b38a46c055bc030. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBMA22571361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca90c66d7ef1091eaec4adb7ef28edd3fa69fdf5e5176e286e82ca9638226e23. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/ES28A1010452.
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
Son para un Sonero: El Concierto (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ab2af7e2e0abc82c28723e89641363140ce5e68eb4cfe57a21f68e021d7fd0. 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/CUA022014163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7cbb77003326b9ec30dab175c88c2f88c56391caf5eb3805ca61ad8f14fef1. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/ES28A1010451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b89b94c6874c9f5cfad0aa31ce19f4b25fe7910af7db5755ebf6ed197d51ab0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES28A1010453.