Rubén Isaac Albarrán Ortega (born February 1, 1967) is a Mexican musician and a member and founder of the alternative rock band Café Tacvba. As singer and frontman of Café Tacvba, the artist has chara
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 0x9b660c5c6a0e118f674b88138ccebc82ebc8f66b41b595a4a0900cc79568e0bc. 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/e7bc12b9-4b3a-4212-ac86-8cf15ff28de8.json and https://artists.proofprofile.net/proofs/artist/e7bc12b9-4b3a-4212-ac86-8cf15ff28de8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Naco Es Chido - la Verdadera Historia de Botellita de Jerez-
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 0x55ff58aa1d0dada0553b6c4ca91ca8f5ed3a3285385b940dc68e11b6a6db3ee5. 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/MXF601201011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00021afe7cce39c01a4e39bd16121e4b0f8af410bd4f440d7686a918135b66cc. 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/ES71G1405355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f7ddf6f423cbede6d7569a7cc9aee1b0ddb03c43ba7c5e0a39c9350387dc17. 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/ES71G2409501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e05e0d5bb9698e2daf5f3ff2b19992c88030beb97eeb180fb66a9fd6bda6490. 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/MXD782004697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2597afe134fd177cc8650fd48399933409399ae67a6ea3df89b7b771bc87534. 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/AR8TN2100510.
Milagro (feat. Rubén Albarrán & Roco Pachukote)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9e896acea92bebddc921dd2ea9ee6f174bcab12506b734b156ce60c15cbf94. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ARF102200171.
Maldita Vecindad Y Los Hijos Del 5to. Patio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa429ca7d72522eef8025d27a01dda7fbeaf5a47cec8d6893abb5d81114658a04. 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/TCAFK2169800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38b1be38f78f49434ddbcb243931f0d57645ccb7f4fe137812b0ab9e198a7f5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/MXF600700386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135a508a2cf36780c50addfe86872c5629990ff38d4228804f412cbb77ecf02e. 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/MXD782301293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a29eb6a21fa090d998ded2d8b032c3c5972ac8134a10023a64af95bca682d94. 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/MXF011500578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66dfe4996c987f9aa537ab8e2887e3d8a50e9f8844abbe133892102041919282. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ARF471600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd975a7f00e7fc33400b6c5318c9a034c561ed277e40d3956a495eaefbed98905. 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/MXF011900305.
Bomboro Quiñá Quiñá (with Rubén Albarrán)
La Sonora Santanera en Su 60 Aniversario
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89f1dfdff96f6db614a1b431a94d8186e98b3279300c57c558a6e7ffee5d357. 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/MXF011600062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5289f834220446d0ca0c6dc19cb5b60ee6d796bf27f2cddfd42efb6163d535f8. 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/GBMA21834487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fbe46487cb60a17cc6551282ef17c31e7e942917b4d8776eb9bbfc35f10c0f. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/MXUM72102544.
Pa'lante Hasta Que Tu Body Aguante 40 Años
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf52e8bf0a13730ee0e9e8ab552fa2f9c943c0340dbf976a92b791ec072d9fc. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:52:50Z), 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/MXD781801866.