Salvador Flores Rivera (14 January 1920 – 5 August 1987), known as Chava Flores, was a Mexican composer and singer of popular and folkloric music. His songs often described the lives of Mexico City's
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 0x202acdd74d1a25f009ec3bd7e0b4ffdc1e5b35f618c569e04dab19575dc2fd90. 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/25a293cb-5336-4658-ad33-e7bf8f3e45d4.json and https://artists.proofprofile.net/proofs/artist/25a293cb-5336-4658-ad33-e7bf8f3e45d4.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 0xb6517279dd5cdfb352615b20e5fa3caf32f15d9eb22b7bad0bb1e0309c1a33a8. 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/MXF600600438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21186ffb2133dba52375d0246791b31da8b8ffde6f1222c3dabf2ca88e0986df. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MXF600600442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ce543142844d43f075858773d40960e3f1be211caeefbff8dfd52a73e01fe6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:59:44Z), 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/MXF600600392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4995e729a68df91682f696a7d0bcd4daf88d2ead5064a86bb742a83a2a4a1925. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/MXF600600398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb42aabcb5a865b1162f7ee85149c894c03351f5ac114e2849d16f1c7fd87a85. 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/MXF600600402.
Mi Barrio - Chava Flores y sus canciones
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5eab62b4c1843517767d3ca22e65719a54f5542ded418fe6b450d1052a48be. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:23:53Z), 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/MXF600600215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4ef28c8636c467297189fe7690642e412b0ec5c09c484d8588761d7dd76a9c. 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/MXF600600216.
Mi Pueblo - Chava Flores y sus canciones
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8cfbffabaa77c91bddb7447ff804cbd8f1cbbcdb8616dda4061eb989cfc5d1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:34:21Z), 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/MXF600600212.
De Buen Humor, Con Las Canciones Y La Voz De Chava Flores
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0483296c175a54d3aa6894c45b83e80c257a9269f60886e345c6c83e56a79cf4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/MXF019201209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fd604dda9198b753d59b885972b0326f38f1d7765454d5ae74d2ed83eae2bf. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/MXF019100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8b51f55c6810d533ff00d1f6cc1acfccf68a4114990177d48219b48e27556a. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/MXF017700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cb5754ad5adfa617299c883b404bf1950dbcfe54f54b0bb0d42a89d5784fa3. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/MXF601000510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164225cb128de775b4c14ca1ef2ccf5eb464be545fdcfa6ad21133a20a70c386. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:08:57Z), 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/MXF601000513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae08c1e18b7c4c8df05252c160e7d3125dc8425e685d4c254a424c2cac356c30. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/MXF601000516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda8fd89d344dcf071bdb1bf29a17ce8011b45e1fb0bb43a1a0e6b4c9e6af079. 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/MXF601000518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98363ab633fd7cd1c0ffe1d53a62ea72dc3c1d94b859faf64e68b4c8f1263e18. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/MXF601000523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b3b4d33d0faf59f8f434c63f58ca66df703b0362ee95899339e4b5720d2ed6. 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/MXF601000524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7460c0ce9397adad7571c968564072bc5937f8b9fd17ca566bd2e9d92f7a76c. 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/MXF601000526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad6afc2e8e4fdab33cf51047732d3a8d740f2e2d3cb44de8e75273f5e7ed65f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MXF601000564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8430d9c414ee93314b727a2b96803ff7738e3b9c96f1365763800a789de879. 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/MXF601000569.
Los Éxitos de Chava Flores en la Voz de Chava Flores y Fernando Rosas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1682d052a6ab1c8b6db01a2b320e0c5f7d07ca464f62883a698255f1d91ab40b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/MXF019100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13958ae0e44856589729694cf99216523f3a4815573e8cffe6627f2b8a9ba7d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:00:16Z), 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/MXF019100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5827a3968796aa191e116b9950168a19cdc407d9302e72be2f313c2ff9d06559. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MXF602000063.