Vicente Barrera, better known as Chente Barrera, is a Tejano musician from San Antonio, Texas. He and his band Taconazo won the 2007 Grammy Award in the Best Tejano Album category and a Latin Grammy n
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 0xaf17d4127e94918481e1f26626ca00f1da3b2127220194a6b00170f765fe4ae5. 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/b161ecc4-e3e1-496d-8fb2-e714aace3d45.json and https://artists.proofprofile.net/proofs/artist/b161ecc4-e3e1-496d-8fb2-e714aace3d45.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 0xcf5c8e8b9046e2a753dbc9436fb65dabd5ba218aa7d4e94827ff760aab850ea5. 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/USHM91188603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f8450ea14352d6b58d41e76e9b02f7e794667158b93893568338331df45ce5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGH1148296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ade49b00326e01e8bff1e72e33a6c9239fbdfbc02eda86ee2e5ecf9bf041c0b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USCGH1148298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dabef9b87ea9fcbc4a29f60877e4e8a3378ec92db66c5449dafaf7f44239bb7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QM6MZ1762724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c7b12cb6ca3baeb4661daa97fb606ee28b627fe967744833b6c7b7b1e5eb4a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6MZ1762726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf50f2abd9b29a2c65c7452e834e7288968fe48a03e922d48453e539c208713. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6MZ1762727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7fc9b9ebc8b7c47c28081d027810f05ea6d83a8a1193a7f440c3ead34132a8. 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/USL4R2026713.
Para el Primo: A Tribute to Roberto Pulido y los Clasicos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfe0425671a23e47d3dd51eb35fa4e537125fe05c4470125af365dceca7941c. 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/QM6MZ1891719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91db324b601ea91a4c43da1f1a85aa97e480a2371c7db5753a47d9d755d2e7a1. 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/QM6MZ1891720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2a2cbd2f8076a8dbc409b2cfd080cc41bf14bd73aaa092a498249442412bfd. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QM6MZ1891716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0583861bbf7cdcc89787c9e2f1d138b7ce30816f1159b55c5c4668071bcaaf00. 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/QM6MZ1891717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02f026b19353f2d0182855abeaeb11955cc82b6a834d329ea339cdd28d45037. 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/QMFMG2362156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1626b7765a60c87ae3a2980a1781f492490104cdcbc090dcdef9b4605c5a8e8c. 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/QM4TX2402268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200e9662c4cc35d651fcc99e34b8bec8c638a96d74898aeed728a00bd87f3ee1. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QM4TX2402270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801f72a76f55ef8a9a5016dfb7b14909bbaa4e96fd146f52c2f0edce9421f4d0. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QM4TX2402271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942adbda78ba8e861b900cb94135a07b2af4b764b5b50b238d74a8e03daa30fd. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QM4TX2402331.