Guty Cárdenas (1905–1932; full name Augusto Alejandro Cárdenas Pinelo) was a Mexican composer, singer and guitarist, noted as a representative of the cancion yucateca style of music. His well-known wo
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 0x65740a3898797ec8b0534efb012ac14eca12e2521b6e43b3a018d2148788857a. 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/33e16ce0-4b39-4a78-b163-73b32e3acc63.json and https://artists.proofprofile.net/proofs/artist/33e16ce0-4b39-4a78-b163-73b32e3acc63.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 0x290f9deb075031d6cc2b841fc1a39686c68bf6d6cb3be41ef403de20a5569143. 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/MXF147100527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe70bd0a0e0d3812cbb323e54f52cf88d54eceaa1d735e7afe005459231a5ce1. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/MXF147100526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b50e899684802747252c58cd81e197e5ef318df22caf02513ca5bb85c7b5c3e. 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/MXF147100534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95aceda8b04304cb4c901738f942405f902a6087d4f33e8949d817395d9bf82f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/MXF147100531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5b962380ac32bd546536ce8c5f86806d90ab32b648d25e20ab75b5f1b33d71. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/MXF147100525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd693dadb3f90d1751f4ed139af2de860bef063dd9fe1dd1cd62d4cca2b0ac6f9. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/MXF147100529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b24860a54318fd88966a4346b3edf5ca72ebb00859e26616b854747ecd28ee3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/MXF146200195.
Aires del Mayab Con Guty Cárdenas y Ricardo Palmerín
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781f794da170562fc98bb5326481118466f7ea24ec10a54beef8340b1db5c05d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/MX2160900628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556cdd905366f925aa517b86d0eaf7ea26b1d68d36dba43ccb674d4e05816cff. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/MX2160900649.
Un Siglo... De Recuerdos Con El Mas Grande Trovador Mexicano Guty Cardenas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6eb1d44dc9a4041b464e55346e592714bc8ae687fe4bdd839828f0ce3a6c0a2. 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/MXF010600226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147649ac96760e0c7e8cd8dace60981a8dd13625e503928989d23b360cfe9f70. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/MXF146200196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d09ff56c0d6e8fe9005bbf57063de8150c557cc84cdad0ec4788c48302ff909. 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/MXF146200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770624f9000b5100744b76c49cd0da37285356d8d6d33986859e86aa3b26c1a3. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/MXF146200201.
La Gran Coleccion Del 60 Aniversario CBS - Guty Cardenas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79089d4cea61651d3e8c09aadb9f634d67c529dd5c208a0da5b1119cf76f366c. 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/MXF146200198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7368b318f7e9091f917de3b6fde59ce0b02cb6b146c20002f56bc2b3be298b. 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/MX2629679510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f138279f1b08f2b8be8d8ad396d89c4ea2191c39275e3c2ae9643ce86c61249. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/MX2629679513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ae06a4d01320a26336cf2c06c659344d62e4c72af66473f0b44f4224dbb4d2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/MX2629679514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e4403e2a52d7fb548bc23ebab9cec21c7d322e150c9823cee503ed15efe388. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/MX2629679516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e2d8e553d84f2cab4dd70577214bd7a02cac253eaaf2fe30dd8cffd9025085. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/MX2629679520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1a8a4f46c3c0fbe47f6af1dbaadf0775ce09fa94e06c809ea1291e85b25bef. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/MX2629679521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede4ca93c8c0e815521c7275c9e5a6b97a95fb1cf0ba18a3d4f09addf770db15. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/MX2629679525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f178b17f98a5062d3cdaa097fb428319b1890ea3122883b6ce93a0de7cae37a. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/MX2629679528.
Ven Vaquerito! - The Cowboy Songs Of Guty Cárdenas
Essential Classics, Vol. 1001: Guty Cárdenas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55e5f729f9d33cb4cb4a0a5024d01a504e8368beeef86b32ceb62586aeec94f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/MX2831300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1ca4b68d10b1c62cf40cffad6b3ec2c42de2498cca41b794a5fab944db52f9. 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/USSM11801733.
Tesoros de Colección - Las Estrellas de la Hora Azul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147649ac96760e0c7e8cd8dace60981a8dd13625e503928989d23b360cfe9f70. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/MXF146200196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8be0ef0cab8a232a5ad62bee63fa41e0053341beed932747bdb471ffed317a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MX2160900708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0fd52d9243f29d8f7b0f73ea5f7d60e1dcce45ce8d331eb6cfe1699e3e9669. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/MX2160900709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468848db2ac0256b001560f25714b16229d63aab845c37e1ce35ff551f32f3cc. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/MX2160900690.