Prudencio Mario Bauzá Cárdenas (April 28, 1911 – July 11, 1993) was an Afro-Cuban jazz bandleader, and jazz musician. He was among the first to introduce Cuban music to the United States by bringing C
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 0xb1ef6423d375e3d677f4ec16929a58ce65f531ada7ab2f2d15e80cb9b0acb88b. 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/2a4d86d9-8a9c-42e6-8e56-c70a8521b325.json and https://artists.proofprofile.net/proofs/artist/2a4d86d9-8a9c-42e6-8e56-c70a8521b325.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 0x1973165ce0d6210979addc76de8dbc0753ab8357cacc0a299e8cbf9734492620. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ESA031421899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02421202cc75af9d5d9efcba34f5795b6c3a933a8783fadafb6f791799e4cba1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ESA031421900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d24c569e244f5bd6352fdcbf7094457fe0d8b9206e1ef80b128785ef2332b0. 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/DEE790515420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27890bcbdde34068ec13eb6fa62932e9173a5a7fc1aa0c636fb591682d4006f0. 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/DEE790515430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90fbba53eba12ec54ac4f417e587821ea46ed306596fa0841868b7b6cf8266b. 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/DEE790515440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70833d55209a1e3b097fafc91ba7d13102a4dc49fd41f55e2d3ae513196ddd8. 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/DEE790515470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25000f12c1b7a997c1999aceeae03dc9036931109313a5e6675da23d478c9d5d. 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/DEE790515510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb565ab8dd2a5dd4e5558de4f9f373299bdc020629cdfa72dfc63d92d8186b932. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEA689200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8814e2adba4c8681dfb22bc92e2a6ee2fe2b2a28ff84cf8edae16ccf1a60e374. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/DEA689200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53274f191d252937e8450dbdef9177b7e647c350982411d563d85ec18c643a91. 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/DEA689200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603e74aca72faac238a01b9f4b439e0306d4c2f647cc088921d233328c84e1b3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEE791806190.