Fidel Nadal (; born Fidel Ernesto Nadal on October 4, 1965) is an Afro-Argentinian Reggae musician, songwriter and pioneer of Argentine Reggae and the underground punk/hardcore movement of Argentina.
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 0x6b2764685fc49aa6b932238b1078cb121694a924c46215cc1ddb2e49b5ce231b. 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/e2797b46-a696-49b5-9874-23d3d6de2a8d.json and https://artists.proofprofile.net/proofs/artist/e2797b46-a696-49b5-9874-23d3d6de2a8d.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 0x7d3c5c63dae4f3149fa8eabde3d8a6b88963fde3fb9db919766a601bea6c0dea. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZNJZ2275011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a9b37c0e0118cd9fc7620c0efe17865fc2fa2b18edd1b6cbd2579676c365f3. 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/QZTPX2191842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568c74e55fff3bfd1d848a88d35990985e16e96406bfa68d2dd3b99c7461e37b. 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/ARF840900691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc255cba3264d1722f658627c6908bf44bbdbbedd940058dec931b47f5d8c5491. 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/ARF840900693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6eb99bd691cc1bbba33aae469ed65fb954ebac297a6f1d3ec17c80ac90ccf4. 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/QZMZ92093366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d0588b1b7154a5d58cf85b1e745d567ec88c22acda73ae3c3ade880fe0e724. 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/ART0G1208125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7fcf65fdb345c80e95914211f15c0ee6568fe83844ebe2ae1b370d3694676d. 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/ARA771000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee4ac805bb521d9d600b4bfb8a483e707b1f07acfedfd031784986105d85045. 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/ARA771000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6363c3072ea1e2c8bcc6a5a07dd2975a30a69f7537519e4d251ff6387f9058fe. 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/ARA771000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea21352facfe959e2eeb98347f02d6fa6d8009e2dfdf9c8b9c4c788833eb6b1c. 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/ARA771000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2406feb12773887a993ec7869da401bbadb86653211a1f4c6b064fd23302d7. 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/ARA771000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88abf55eaea41aaae286ffb72edfecae7b61bc2c27d649aa07e0df0681f2be97. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ARA771000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b60c2d085fd4b9159311da15151e4b6636049ec1f8429134b13aa21ba6b156e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ARA771000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe680ca731082da85b37918a20045957dd08fbb1c3269638436114d3510684b. 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/ARA771000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229cef7414d1e2820d7cc90e38db6040c1a678b1aa169c72f5c610d278edd05b. 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/ARA771000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a69c9c62aad999aaa42ca4aefd6c079ebedb4db707e6274472175386be9726e. 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/ARA771000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ac4ff06502c29d40bafabe2d83bfc9beb444f585140257ae5616bfd13dea3b. 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/ARA771000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91894967186976f42d12b94d3993076ef7d35c78f3c85de6c9ece7d64c33d472. 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/ARA771000072.