Arnoldo Castillo (April 29, 1922 – September 29, 2005) was an Argentine politician. Life and times Arnoldo Aníbal Castillo was born to Carmen Berrondo and Gualberto Castillo in Quilmes, a suburb of B
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 0x6c38eaf8f3501f596cdc5dbb63c1445e30b1748b226c795eec3607e2f04a06f7. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c517a8bc-915b-41e7-9b6c-ee7bf9435cae.json and https://artists.proofprofile.net/proofs/artist/c517a8bc-915b-41e7-9b6c-ee7bf9435cae.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 0xaeb8e8d46b827c7421bd54f9910e197002a78dbe5c3b19ebe00ae0441ee4cc60. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USX9P1008914.
Medley Tico: La Patriótica Costarricense / La Guaria Morada / Amor de Temporada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0a113ac4a20d0001b7974ec20ff0871c21b3a2969a44173c5d2c7500689131. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USX9P1011037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c61ba16304736368c838761e16e4c0c20d56af8d0b12ce12ae18b64228635b. 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/USHM82153829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719ac8a723587cb00a5e6cd3eaea42b9ab2f537cd535637ce0ae00d500a555cc. 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/USHM82153830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf7efc81815703005a6a4cbb94f48b68272c83b2330ef507f09e8bd9563165e. 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/USHM82153831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bbce4555b2d627ced99afc87e9b61020f0a909e80bdd4ed0118e9c26de757b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM82153832.
Medley Fidelidad: Tu Fidelidad / Tu Has Sido Fiel / Tu Mirada - En Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3699d247c2c368d64531b249e6fc369c247fd5e8a090f364d0063ab56e30b204. 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/USHM82153833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554131b7905f8b4d23e479246625615670d2902fa735d6045280897dac6467c0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM82153834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbd30e70aca8fa6fd1175ac1a4896caac9dce9abb21051f9d78dc916b85b922. 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/USHM82153835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f735da051d4344af181bfae892959ee40d76b606151b75941e4efb6788c5f9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM82153836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa567d96cfcd2cd8661dd9d506f9ed0d5f4071e2964a33c6fa810a8e33eab110c. 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/USHM82153837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe13d596c88d887540fdafe28c70daa1fa6ee744e0342398fa916866bed02d48. 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/USHM82153838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd14889921abd98274aee130d674c5f2ca11b0e4ed84985e94e72d93417b7313. 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/USHM82153839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ce6ef2c5942937335699fe466954dca12cce0a8de2d4788656af0b7949900e. 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/USHM82153840.
Medley Francisco Céspedes: Todo Es un Misterio / Remolino (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb1461658cc0e3fbaf44e1da2352d0f7379fa79f8e61b50d3c0dcc56bce043b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDY41875499.