José Madero Vizcaíno (born September 1, 1980), better known as Pepe Madero, is a Mexican singer, musician, composer, producer, lawyer, writer and podcaster. Madero began his musical career as a vocali
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 0x3afecd7d329b892ebe24294a7830a85c4affc3a9e37dc1062e59aae01af0f4e3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99cb87e4-e528-48b1-93ae-44e73334dfcc.json and https://artists.proofprofile.net/proofs/artist/99cb87e4-e528-48b1-93ae-44e73334dfcc.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 0x163085e4f00196e8db733dce1c8603d2681fc98b238550eec643fd0652cc3ea7. 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/MXUV71600274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc3d413822adcf51398e2a3c87320967eb35065c87a9057988a9abb48225954. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:03:20Z), 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/MXUV71700354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a9a4ce6699bb6941a04c8efc0f3e6838fb3efb42d0719a6f7be5a80c4e7387. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/MXUV71900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7387677921600905f144619df12ee2c719759a9fbb5bbcee1ba00178de95efb1. 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/MXUV71900322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674c5e688b3b85a285a097f0fac05598fd2819322e677bb071827ccf148917ed. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/MXUV71900512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb55279652dcecf87606f4498de60000d3a39098941ade4ce96313ff0b2cf6aa. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/MXUV72001232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d5023b77a7d4ab6f0c806d399d255261a6be3ebf61ab62225a86a71414ec18. 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/MXUV72400222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ad5e67d5e339197e77faee356142737bed5b5db93b798f1cdee66af2905d92. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:26:45Z), 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/MXUV72500950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e3ed7dd5b8e902ca6f5bd8cdaacaee2930212f93557cfe932683b4db60efdb. 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/QMKHM2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf161497ffabb7eb5f768eee678e79bdbd9e72e0694993ac48d048fb83a6a505f. 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/USHM91821535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53e1007067869596d11de0815235228faacce4e3b161e689db03e1047b21424. 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/MXUM71502531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3835cd3ce145fb6fb080602db7dbaa4568674e504400810849aea50f5f9d86. 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/MX2682100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb761021725d93c9190473f900f4231e2065e7be4dfbf8fea34043f7d5e585e. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/MXUM72007048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68712a78c389a6ff4770784cd78d698b4e8b17c88cda105705a1c948869e17ee. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/MXUM72008847.
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 0xe9eefe6bd9c97a8d0acb7d1bf50b0cf52521362a34b965c2d13959e907135e98. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/MXUM71502538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a16cb9dbdc1c6a8648bd02893c837ba0d4d7a0e6142412e0a2ff4ccdc748076. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/MXUM72102893.