Felipe Pigna (born 29 May 1959) is an Argentine historian and writer. He is among the best-selling authors from Argentina.Felipe Pigna: "Me gustaría que mis críticos se tomen el trabajo de leerme" No
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 0x8a0d7bd4adeca380f87bffc7dbadc3275afaa40f72cd867f79747075679089ff. 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/e5d73c8b-624b-4881-92d5-a39d78d47fec.json and https://artists.proofprofile.net/proofs/artist/e5d73c8b-624b-4881-92d5-a39d78d47fec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Capítulo 01 - Dictadura y Medios (Parte 1)
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 0x17f0d273a8b05c0c9869cb8ad1a4b4ab1775de4feeb301617d28268adc8901e1. 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/ARQMP1800008.
Capítulo 02 - Dictadura y Medios (Parte 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c73fac92bd1a7eaeedac777c42f13a76b5a69d1c559003c37d41baacab4fad5. 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/ARQMP1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf1744637521e2a9b80ac0c492399ae353daa3e596ac4d8360c69b543648080. 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/ARQMP1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2583948ff4551c199a565477fe82f525805367ddd8351cb4b1a55a957716444. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ARQMP1800011.
Capítulo 05 - Enrique Santos Discépolo (Parte 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc443a5071c79031a7b4464105715478ecaa051c7c2c5fe56db0eb099a3dc11f3. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ARQMP1800012.
Capítulo 06 - Enrique Santos Discépolo (Parte 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c366b097c31f6e1ec1b6fd030c46b126931bf43f6297faf0e7fdaf78e47adb. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/ARQMP1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6cce74199a7ab1837deff7bb8f19099398f91b98edb9c69785c645b4064ad3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARQMP1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c00f0cdb592f7e2b907af14b2230b803be47790d2f56b0a9182e7780c23855. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARQMP1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3082840d995ce82391164e05c26571e8a513dcc1f394965cc23dea9c1296a059. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ARQMP1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b988f45498ef9bd6d19efe63b43df828a8dc2a18ea9f19daf2f9c1116aec067. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ARQMP1800017.
Capítulo 11 - Arturo Umberto Illia (Parte 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8f1aff4b5d092d0d67eb2debeab42aa7dedd42dc701ea96f01582a988929d0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARQMP1800018.
Capítulo 12 - Arturo Umberto Illia (Parte 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664b59162daaaafe4033caf67f49eb4f218a8b3ccaf5da4466913e28321ac1ca. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ARQMP1800019.
Capítulo 13 - Juan Martin Guevara (Parte 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9afe870060f70b7b5b878c98d8e7561c4b61f672bd41b54a9caa798ddb6653. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARQMP1800020.
Capítulo 14 - Juan Martin Guevara (Parte 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebc2ce0252a4ba3846318430775514bcce6a1313b2c6bd199b6b1017221b156. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ARQMP1800021.
Capítulo 15 - Eva Duarte de Perón (Parte 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf1b189e1d5bc30d558ffd8ab4ad145675f26c851ccd9773e713c79c7d16c28. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARQMP1800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abf3aa831dc86eab1800d3b6091f20a8698f48587ee346cedebcccdadfd81f6. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ARQMP1800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2c7ccdd0aac58eb7e3deed31621a2ca59e076df4964da748dffb54c03244f2. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/ARQMP1800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6663fc495548d497317e243e1aba68449a79e2c16910c6510f89770cca8f75f6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARQMP1800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a334a36ac8e2d698f9399f72e8cfa8974965e2285fa09c800115f57f3997197. 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/ARQMP1800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1208d39e52c979fb985558dcf04557616253afaaeff9db25378578dbe39a10e2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ARQMP1800033.
Capítulo 27 - Jorge Luis Borges (Parte 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6542c2237cdca0afadce75240ce3c1eb29c0b8ea39a30396cb564333ab171f. 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/ARQMP1800034.
Capítulo 28 - Jorge Luis Borges (Parte 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fafaee10c5f2b893b024c3f47b95e8023037324cdf9075e3ddb4d90b6aed64. 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/ARQMP1800035.
Capítulo 29 - Primera Presidencia de Juan Domingo Perón (Parte 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f9706baaddd3f38944c9f2443d884a8326ef54d9c11ab4902911bba4982b91. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ARQMP1800036.
Capítulo 30 - Primera Presidencia de Juan Domingo Perón (Parte 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dec1fab48d8822c7b4d320bb97f3b06474c05d9cb37b0a2a7a596fd15b8471. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARQMP1800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda67b16e8ae55059db26512f2cf96559742365fc2c30cf586dcd1979c5ebe822. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ARQMP1800038.
Capítulo 35 - Bombardeo de la Plaza de Mayo (Parte 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f00c2d0fea599d6ac60c789541ad60ec440b41253a99b41b9c67864c3c68f68. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARQMP1800042.
Capítulo 36 - Bombardeo de la Plaza de Mayo (Parte 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537ead23a9b0ca637ed1a7fbd20a5af41c5b83ddde53403de89d115b00714cce. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARQMP1800043.
Capitulo 41 - 17 de Octubre 1945 (Parte 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1100c15659c2403b7f8bcda668d831388daf1073e33d77d42280d096749d1df. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ARQMP1800049.
Capítulo 42 - 17 de Octubre 1945 (Parte 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e94393cbd595a77c56ec31d060bb4926cbfdd2ced904705b0570a33751f551. 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/ARQMP1800050.
Capítulo 43 - Juicio a las Juntas (Parte 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bd58fa7de5d017abfb140839721794ff05bd35cdf9823599fd2de3e5fe4dfb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ARQMP1800051.
Capítulo 45 - Alejandro Dolina (Parte 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574c7cecfd7c66c6c6c0e307d5c0bccbca85e065f691dd6392b4ec6036b63be5. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ARQMP1800053.
Capítulo 46 - Alejandro Dolina (Parte 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199fbf477b3e487e184fb2e02e14d100282afe59c0f4bb1da351d36ee6776b45. 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/ARQMP1800054.
Capítulo 47 - los Extraños Orígenes de Jorge Luis Borges (Parte 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ba895d1c0f811e449af9fe5528577b350e448db4a6c3874282e27704dd8e62. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARQMP1800055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c25e62f2d4f19b895ac1cf93c92641094e58e0ab38664a5fb081eb01e3742c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ARQMP1800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664fa1abd42829fedc14615a289dcc8bcbc40587b61b2db40508cf54975fae9c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARQMP1800058.