Francisco Javier Barraza Rodríguez, better known as Pancho Barraza, (born 17 June 1961) is a Mexican singer-songwriter. Early life Barraza was born and raised in Sinaloa. His parents separated when
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 0xf453254c3cb108c933b930c7fa4ceb00ab37329b51298cd0372ec7ee9fbb81b4. 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/31eaaf60-ce9d-4b7b-b15a-ea6acae40a66.json and https://artists.proofprofile.net/proofs/artist/31eaaf60-ce9d-4b7b-b15a-ea6acae40a66.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 0x577783727d36b1e94684829205803c154c1c71b1d2e6d4cc8972321dac9f6b79. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MXUM71701511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f425355fc1479ae97a616779dbb8cc4ec5742c9c4dca9f81796c84b88aeffd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF399601972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745e7cbceae9b04ce1a6cd8c825ce83b89fc99e5659d003f4e4fb46c0efd8dfe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USE7D2100245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933119f71911f1c3440f124dd52c1ec942eb41397b60f1c5f900b25f77801fde. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDQH2162754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02501be8a7ae783b38fec3f05db3f45b57d4a8c81a8a14b3132f15ad4b2e8805. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDQH2155042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acce13e3af85786abf54e6019fe53f70189b0070d0d352169f455b97b7c0a69. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6DC2096405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ff2cccb01f189a1ea88fe958c8a956847b17e4521f03cfbbfad25af0257d95. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUM71819666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0809da98d107a8e09f687319d1712824688311189fc6027370b909bac2c88d2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDQH2158117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f1e451915dbb2479c4d66bd00a8b098cfa8ec162c345d5a88332f6bf3f30da. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MX4881600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcc02013773cef3a1471a19efdaa4891ab29871fe88f1a8e5721e9184c847e9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDQH2259711.
Popurrí: Vuelve Por Favor, Ya Se Fue - En Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da5dfed6a76ecb4e2d7c8d8fd3d84768a8bc091ff69e0de9fe17c6d3da195b2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMDNX1810395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7417c6f0ff85dc44c0bcb5629a343a52235786a2c13898a7c16f3063a6baa0a1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMDNX1810397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9bf44f79b952d5b3081095f9dab674dba334f718610ce650f3a55f86dfadf0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDNX1810398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622b736f520be13c43479e6b53a42f21df688d467a4d711e2cbe416798e3ee59. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJW2436256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc28504164d5589f9638f5b87c25549792fba10ea46ba2e39d37e6a083f345ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZG651900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577783727d36b1e94684829205803c154c1c71b1d2e6d4cc8972321dac9f6b79. 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/MXUM71701511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8273bd8e560feb484bf5619cc78a4aed7d61d1770883e8491d664ee3a34e51f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TW2140217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1019af0b87c8eb29f5a984cbfde4e02081e6d4756a046c4ca2831a88252f7112. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDQH2157017.
Chuy Lizarraga y Su Banda Tierra Sinaloense
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654b11c9a0eccd418ca37533682bc53153678f6fa73a36639e229354572b44e4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDQH2156359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1019af0b87c8eb29f5a984cbfde4e02081e6d4756a046c4ca2831a88252f7112. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDQH2157017.