Antonio de la Rosa (October 31, 1931, in Sarita, Texas – June 2, 2004) was an influential tejano musician. He was noted for producing dynamic and harmonic accordion runs on the two-row button accordio
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 0xccbe8b794c2cb828cc86fe2404b84b6445fc3ed705c558cbdc9d275c30a77c07. 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/2a7231a8-4752-4bb1-86c6-a65e8476f5e1.json and https://artists.proofprofile.net/proofs/artist/2a7231a8-4752-4bb1-86c6-a65e8476f5e1.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 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 0x88638caa7db0678f1489c1e5e58db6d8e0d865fbd13644c90b8138bb1d25e1fc. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/USRO29164601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb460721458a486a9cf4931f2bec34c26ac4d792a4d46225c928125d4d70072b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USRO29164602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a389e492be9ca27ee21d4c4c20f795653e399035784207b6b4bbcfe04758eb. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/USRO29164604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058a883052d39a610f34238b4a434027c68d0a6f9412208e886e89fa1e54436e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/USRO29164609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b09cf709ac775779688e0d63f317b5b5896d8d46b4584bf40e2d75c2bcc90bc. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/USRO29506615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed2212da3beb4f46b952da25eddf90c87842a37c69e33d3909a70f97b8d74b0. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/US2Y30633665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ee6d7c86c58d0cb1bfef4a99ec6171f1be9d8175886a1b9603f948d39293f5. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/US2Y30632070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75812fd74759b68df8acf65d6b090aad535db0bc3e17feb67406c835e5124f97. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/US2Y30632384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685c59f7ae91dab164e0fd9a66b72ce01a28e11249399c2e327973c2c638a181. 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/US2Y30632388.
Popurri: El Chicano Alegre, Tengo Penas, Mi Vida De Borracho, Que Bonito, La Espiga, Pobre De Mi Corazon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55be4066badd1e73d23fb820ddaa87f954ae23be3c67d318b61f8d4228c20bae. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/US2Y30633144.
Popurri: Mil Cadenas, La Estrella, Cuatro Paderes, Companera, Escaleras De La Carcel, Un Gran Rosa De Oro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae4ae86571b056494991fc9bfd1955149cf2b8b67ad0ea9c447014c9f868161. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/US2Y30633142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3337833e127d720ade509eedfdcbf3d54a29d04689b914a0777ed908d18e2d10. 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/US2Y30632162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ac1908596da6a36f9091f6eeb0d0e268679a20e48fc2dee9f80507615525cd. 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/US2Y30632158.
Popurri De La Rosa #2: Mil Cadenas, La Estrella, Cuatro Paredes, Companera, Escaleras De La Carcel, La Rosa De Oro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b9c161450f66d400612c3699e3296f427cc6047f19843ecec9d3ab61c3cf05. 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/US2Y30632159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5d58e340021669aee18f73cace3276a3e8faf0c2030195773eab625d310361. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/US2Y30632266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533bbf6fca87efe3858075bc67ea60c75121d6ceb9ffc18ef9d0d33c670198c2. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZDAL2020150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57123735b294ee037f8d91b4486fa846409b8637ae957042d34d5ff6e9fa5f79. 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/QZDAL2020155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78da4b6252f34cff24128dd1da3c7cc77ae64d84071be19c2fcad1033eba878b. 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/QZDAL2020158.
Conjunto! Texas-Mexican Border Music, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763544bc8aebd4cf8e01b041a3559d5fd2642a6ea496303ca5dab3827dfc23a0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USRO28802302.