Los Zafiros (The Sapphires) were a Cuban close-harmony vocal group working from 1962 until 1976.Giro, Radamés 2007. Diccionario enciclopédico de la música en Cuba. La Habana. vol 4, p298, says the gro
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 0x4164eb49731314dfcbc864b0711802cb9a137e99aaab33d3e614ffe570450af8. 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/01e81bf4-803e-4387-a89c-d624fb180397.json and https://artists.proofprofile.net/proofs/artist/01e81bf4-803e-4387-a89c-d624fb180397.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 0x26413cb3a7b7ab703a54ce27653f41b9f50669bff022fd51b93be286620e658c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DE1A32127864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185d23abacaa3e82086fcf48826d9a56ab67d7f8d4ed135b2fbfa382f6712ca3. 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/DE1A32127866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74567d08e17ce44a67a904ec542742226e659eb8d46ab66d57e3c32ce69a4a59. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DE1A32127870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4302539ae0097e729f6c3df2066fdf9d1acb484c96c8647dc3e88577cfb65a0a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DE1A32127875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ade657924390a920e329c46c7b631b72a71a53edda4d55aaadc09d9d0e3d2b. 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/DE1A42196647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19de4c71667e3ad3667979f73bb69d55cd51f0602fdd12dc31617b69885794b2. 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/DE1A42196648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7419916818fc1e436ed9bf4ff45befcb2b26901768af8cf2a0fabe942cbfda. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DE1A42196649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b68b46c73c84f8aa138f4bae29e08325d76b558f855588c26021dce235eed4. 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/DE1A42196650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50aaf0107219528b4ebc69e1c6f4c46ba387f589973e65d2d2211d99fbe1cd1a. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:55:38Z), 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/DE1A42196656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79045fcde0d354d17cb80f3d1587f603ad1f90464b4dde6c151c967b4884bf4. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DE1A42196662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775ad728b69a05e59b18ee136072ed34e6a71879096cf28fd320bab67c70ff1d. 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/DE1A42196663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ef4f83797942fbe9c0d058d81a8ea9349b4801c637528674630ac3d2a4dc8f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMFMG1593830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737efe0f6c0674e12b06b6e719225d66d4d788d06430101940b1875f9db5295f. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QMFMG1593832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc8a19817c3ad0bac4f435f57be148ac5691e0a009b93927bf2163bce10d50c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:04:21Z), 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/QM7281981802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf3eee082c8b930ce816d80f6f8ed229fc3ff9edc15eba10ae3dfb647db4772. 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/US4XG9401542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81791f20155a7455ded9ae8ad0ee5b0f62ce8b19a03e7e448d734e362feadf1c. 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/QMFME2165297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe30fcac32bef4fcfed235b86e9fb1a2f50c6a870eb6b9a9572aa2e1c8bb4dff. 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/GBBGU9905603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfcdda52083797d7ffacbf7ba9a44c18084b01ea6f8678a5f62adbf85b2b90e. 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/GBBGU9905605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ef2caa70fdf9b9b74934ad996d880033eb8b5cc294dab5e9bf7682ec36db1c. 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/GBBGU9905606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8569f0ad30672fdebf5d3798eaaded40fd6ca93b733a44ba3be99ed535e1232e. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:39:21Z), 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/GBBGU9905608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e79f1ad484e8b27969ba1abd691e59b7e01ca86a2f18d656e2c04ac70980dcc. 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/GBBGU0995616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18479457770d03a5d6412241d38fb0ef124ce98ace0b341f16d158a8461de006. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:49:31Z), 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/ES71G2061658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaef3b8bbd2adedf58026f97fd8a1be36e34361d0ded34df467d601c83eba9bc. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USZ830300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3c2101ccb884d175a84ad3eba490d9046f63f852a79fd128b96c2c5bab5cfd. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FR6V80214071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dbb2ffdc517fcd60960a3fc94b890a7e1ea7fec0514e1ceb59473aaaf945ba. 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/ES6601600487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffea22cee6be392829a5627a2669f8a068074f9d86fd395b4eb3d07726060b1c. 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/ES6601600500.
Afro Cuban Roots Presents Rhythms of Cuba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0582bd89170fe5b3940cbd924ef7850b4577d75ff4287c68dfd254873552d9. 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/USZZR0810422.