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 0xb481ccd0f180e03e3bdc9e9a49e20412812992d4e9420dc1163fa71f6b87afeb. 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/3e0bc375-c38f-4e5c-8b3b-44b65416910d.json and https://artists.proofprofile.net/proofs/artist/3e0bc375-c38f-4e5c-8b3b-44b65416910d.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 0xdc3be0d95b1fd95c7ea9bac8ec88c5f32168efafedc31bb397e018e1c47795c1. 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/MXF061300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf4142a8bdd650e65e636e8e3f00518e9069db9368a60f1244e4f8dae1e1313. 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/MXF061300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917e9f4540abf7217e5f18ce94c7ec6812e69d7f74ebe1bb7a350d4105485c83. 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/MXF061300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bf041037d14929d8b997b7b053dde09e3eeefc5d3d675efba958b657cb9bb2. 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/MXF061300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fdf98fe4930e4dc26ad7fea35d692aa8051e3b803891382d1539e8b200cafe. 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/MXF061300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ae40d2d45955742cc5fdb97bb9e3449d226e9ea2a85b449eac7b8849ba1bf2. 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/MXF061300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf404d3a0b8069017ea7e702fa2a07a9b0e66066890c05ee69ed15a8821500e41. 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/MXF061300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3766cc76be4827aa307439617555acb5a4bef375252372e877a233bcf3f2b5e9. 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/MXF061300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf4142a8bdd650e65e636e8e3f00518e9069db9368a60f1244e4f8dae1e1313. 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/MXF061300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7dde786f6dcb9c50cc4e5131e849b58e2b2aa5864c608194de01f72a84d1f1. 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/QM7281941487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204062fd8fa298d766efb2fd337bc548136f39d04ae23edb6926e63f2875dbc8. 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/QMBZ91983234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8300156a4fda04fb9a1530d3c8e00fc25dbe9a3ffb28e981b3bd806ddb68b6. 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/MXF061100485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e3bf732e81bdf9d08c47aa0cb11cd763bbe58b8a26b3875035baa1df12eda0. 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/MXF061100487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af298b1f4f0b99ed26083c7ec76e9d9e5429241cd9997d36ae848972fcfbb40. 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/MXF061100488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85040307130af3150e9e033a19ffa3452f132755d2084f9208fc6aad290e5d9. 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/MXF061100489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53008d17c450b877dd6c09c60e9f9159cb4b4d1b6fa1f54ccea15c3621e1cb96. 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/MXF061100491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270d2e56a36257d148d420fc0e11af9ac549d7d3426cbbffa81c0986c67457ed. 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/MXF061100495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7696a7f79acccfcdfdcc01ba0b2e2761e1912b89d5ed43da4fc44c5ec6ef87d7. 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/MXF061100497.
Orquesta Mexicana de Tango & César Olguín
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585ef00d08ba097a0eacc6247ccaf57cdda87329e78361f7ffda582f1d768881. 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/QM4TX2057076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604aa428dc22e546411fa355752df741355fbfd4e05a6a7f549fe354520c8c4c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QM4TX2080045.
Cri Cri Interpretado Por Eugenia Leon Y La Orquesta De Baja California
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7fe216c7b2a1fee2133536bcd7256f0afbbd16260b1aba56fad5bdf4a289f2. 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/QM6P42581803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe31ca4ac929b6eb5cb3787a15cc0841fc941d28ca60e850f7fff0771a1454ad. 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/QMFMF2441199.
Amar Y Vivir (En Vivo Desde La Ciudad De México, 2017)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477fdb9ae0d767083d8ae26d09663fa153376fef9b0868ca32fba08951254c90. 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/USUM71701019.
Aunque Me Cueste la Vida (with Eugenia León)
La Sonora Santanera en Su 60 Aniversario
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c639920404f3bd6b2756c792770d0dd83aeeb3f5db40578870f563ca062b22. 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/MXF011600065.
Tequila y Canción (with Eugenia León) - En Vivo
Necesito un Bolero [(Edición de Lujo)[En Vivo]]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c22c64acedae35b9f0b507545813547cc56b8e3df1e00811d964f89fe2c7db1. 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/MXF011500420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be8c9d7fbcfcde2b84c2c3d3046c4351b355d0f20f9454bb9a9da67fd65a83b. 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/MXF011600040.