León Rubén Larregui Marín (born December 1, 1973) is a Mexican singer, songwriter, and producer, best known as the lead vocalist of the Mexican band Zoé. As a solo artist, he has recorded three albums
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 0x50a526171337e417321aac89eb758b6b7c13ebf46438374168bd9877a2d2fbc5. 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/2b104ba2-42d8-4633-a7cc-617a45195934.json and https://artists.proofprofile.net/proofs/artist/2b104ba2-42d8-4633-a7cc-617a45195934.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 0x7ab9202f1c9780ca10ccb71217994075c55d210c3578e8703177eea25335f21e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/MXF061200431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f38b75bd29adfcf345b1441c3c8c7e12ff43e7ae95a718d75aeb58a8d4ba396. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/MXF061200435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5058c10d539f839d7f5b22914b3f3d879b1b2e9a23d34a608457a6757c6a119a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MXF061200436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e35ff49a9ac7f08693838cedcc1e0c855420c71ce8572534ec5f162155f0a16. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/MXF061200437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5e02c50ce30c2180ed526ffaf7ecdaa1e1168c664648b69d7cca5e167df607. 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/MXF061200438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fa50306e5ffc711fc4708a0787293128840cc44756bc1abc9013d33cfafa7e. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/MXF061300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6a9425758a312f96e6a555a4d1473ed32b48a8ed58c3d1bfbceb10ee5bd757. 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/MXF061300077.
Cero No Ser - Salvador Y El Unicornio Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74c8b96fe7a81e961e7671af54ad5d71ae75d3e5fc40ef743af9ad6b90ce445. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/MXUM71602442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8aa266a7bf7ec6ffe6d457982717174d5801460511a1cdcaa15a0fdb6e9d0b1. 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/MXUM71602441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116ed891549c8437d4ae2660041713f6559c09203a8b53ec5951bd2f9190be35. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/MXUM71602443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc143a3fe169df93336e7661017864c2d9c4da8f0c927f413c2a80f715d25988d. 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/MXUM71602444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4467f8cfa8d31447415e45812579481cdaa6a732a63e5d23ee56c96e85aa863b. 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/MXUM71602445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd00802a3e4b5b68f8013f80a33003ea006835f720f64d4ad7f0bc3e9fbda51. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/MXUM71602446.
Rue Vieille Du Temple - Giorgio Reni Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9063bff84d2813acf1f0fe01b2c636ac402dd6dbcfae02acf62e1ab8591f8031. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/MXUM71602447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec31a9da40df81bb8cdd5bd7f18d570ec8dbac9d4476e69cd590a51e3858cda6. 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/MXUM72201953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a845958f3e235f5e515bd3ab53165bd287a5dedff3427f2743e110385b7d864. 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/MXUM72201956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cd1c6868cd62b26ca6940ee0a3e6d6976b39dd6c7453a911ce6947bad2255d. 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/MXUM72201950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f3637e7c3d7b00719f3a5ca88cea9f9d53dbfbcc0ea7af63b8c64aaa4f3b48. 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/MXUM72201948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbf923baf898355a9e62f9981313847f2994498da5599338ab277a1c1e329a9. 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/MXUM72201947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95f7e703ff1c0e0ff180f236b0d55b4445730859a6f6e7b79a1f0557320ba50. 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/MXUM72201952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec31a9da40df81bb8cdd5bd7f18d570ec8dbac9d4476e69cd590a51e3858cda6. 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/MXUM72201953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c74ec48e0d40f822ac405cf6fc0687ad63e50a5baaed128854922047444b0d7. 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/MXUM72201954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde157670068c20b3b42575cbed1c0e2ff914e4c7bc161836102255484d7630e2. 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/MXUM72201955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a845958f3e235f5e515bd3ab53165bd287a5dedff3427f2743e110385b7d864. 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/MXUM72201956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3314d47fda443c9214606847716c0383af2038719fa4a5da5d7aaed5a2a4cd. 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/MXUM72201957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5de24ca0e863d4605bf5bb5502bfba9d985f5a285105b6ae07dea952b663e9. 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/MXUM72201958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce8128bd041b3ef7042510f5968271e1e0b372a5920b4fc9e03dc1b657e8fa6. 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/MXUM72201959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe44d8e9add20a921e24354cd5a7b915eb0a2b77055df6b1c74a7f096cd01378. 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/MXUM72201960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8fbc8bab776eaf648bd0cd169e75f56b42b017d5252e6f19679ef956b5eeb6. 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/MXUM72201961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf46449c01ce8f1208fa54b040834a97fe0cbe76d1f1c50d5dcb56a78eb37fc. 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/MXUM72201962.
Su Majestad La Eternidad (Códex Fénix Rework)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5a5e7cd5633a73567eb67310aa015dd955168874a18a3a603fd27f73349875. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/MXUM72401986.
Su Majestad La Eternidad - MNKYBSNSS Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ba6ca8df142f65ca81c352741dd2e6b70003d79b0ae24f627768ca452d4ef9. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/MXUM72401467.
Chromocosmic Avenue - Manuel Sahagun Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffe67423f1d4f94e611c63482d6b274b4f94329cf1e7a603f57915395d78438. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/MXUM72401475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31799c89e8ddf6d5acbc7443932c04757c933cfb7b8878e56c4aac1332080e27. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/MXUM72401488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21c10d318cee51e719132d50929d9e61b447299ec1c992711d97c2bc042e829. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:02:27Z), 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/MXUM72401481.
Brillas (en vivo desde el Palacio de los Deportes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd87900697f8c7e8e07ee7723b752faa5e6952535fe3ffe6ab2904ec675f8b01. 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/MX3741700557.