La Sonora Matancera is a Cuban band that played Latin American urban popular dance music. Founded in 1924 and led for more than five decades by guitarist, vocalist, composer, and producer Rogelio Mart
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 0x954bb7d95f0cadafe01c7cafdb4b828db1422c7b63292a99691f397067a6ce5b. 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/c8484428-7106-43ef-ac3e-71564d5b2021.json and https://artists.proofprofile.net/proofs/artist/c8484428-7106-43ef-ac3e-71564d5b2021.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 0x06bad6d244a29f108b112dd50c5c76069fecfc22a2a49dc20276742abd6c0bc1. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/FR8X00800597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a484cace53a67fef2ac6f9cfaca7f1ac31e5a79bad6260f1cef1a51e6b662f. 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/FR8X00800599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6096f267dd825976abd8d3e57d7ed086c6796dc59e05c1eb3e33890300405611. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FR8X00800600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7eafcc066bc57eeb0bbcd9d22045fcaa2201142c345ea65de73b69501421c64. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR8X00800602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6ca4b847778db09ee8f0457e8827f56a3241905cda223af35ca97ec094ab9e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:44Z), 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/FR8X00800607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3da8b03abe172ba3705b1d7008aefd70fae1b700f8563178ea608e1977763b. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:22:49Z), 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/FR8X00800587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175723c8b014db736d74fbc5500b5e53a491a6b05e62ce39d91633f1e67facaf. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FR8X00800612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79911847857088e10854e56bdda66e0fc70233fd400aac142d5551c007d6e19. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IT9T31500785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f694c6c85f6405fccdf75a8be1b0da800395790602dd1298c6d68f8c63a95e. 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/IT9T31500786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135d5d31f28f9c6e5787cebdeaff529293c579ff8d86b4a07f290bc99ce76bb2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/IT9T31500787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095d78adc992609ae8a8206f1d35006510ffad63d136734e2f85b1552e9971fa. 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/IT9T31500788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5c73318f2a745aee934177db93ff266ea715394083234e1dbf12de1de31126. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:33:01Z), 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/IT9T31500789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82faa9c5f4823807a85b923b6b5b32f2a8cab4c4ffebb28089ec133a7f86ac70. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/IT9T31500790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4fc1738914f35bd24b757850a669a314642a2ef7f3fbecc7e1457daaa31990. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:44:53Z), 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/IT9T31500791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ca82bbfd59e704a729eb0918898f0f6ee7469273aa5b121142b44183d02fda. 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/IT9T31500792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cc101aabd8972b0e1f2ce1ed472d3a0dc1b986c87216294ebf286958260ff6. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:08:43Z), 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/IT9T31500794.