Tamara Castro (4 December 1972 – 8 December 2006) was a famous singer of Argentine folk music. Biography Early years Castro was born on December 4, 1972, in Ensenada, but grew up and spent most
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 0x8ffdbe8d3a368d2fcfa331328cf9100c2587929a65996c601f6f03e02b7feca6. 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/32a2f631-a28b-48ac-9716-8a4e09f34517.json and https://artists.proofprofile.net/proofs/artist/32a2f631-a28b-48ac-9716-8a4e09f34517.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 0xc0f178c97bae146375856610c4f1b1a3c051ea883e725d9c77a4e04e45db9b31. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/ES71G1843048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a62f7a5b40350f4a9c4ad473c9d0c5f0a17a8bdacc889de0bd58d4c7fa01f8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES71G1843050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a47d406ed068de2e54df49fb62726dc089d90baec6002e34bff914cf55d8c29. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ES71G1843056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6888e4d9f49776ee20d96bfbb4ba7caad1e3d436fc8914af583759c749f08ffa. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ARG601011801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a45fa47eacf8ca513a3742b88d37ebdc45180208b16fd3309bcbcc927b854df. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ARG601011803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cf68c2fc1d7a0b701936909f83fee3d5e2cb06bd053086199f484feb13622f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARG601011805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a954b462f71c819ef599b7e265b0a2a4cc376a665cf90f516a8910e5600d1e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:11:57Z), 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/ARG601011780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0d5fb383ce0e26dfe92b83daa3575ef441db5f2868c558362127a1539551ed. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARG601011782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90084c6ad0fd14c9dd6a1a9aeedd81a5a0cb6415e4f62c6f7463b5ef6ad760d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ARG601011786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f2b03f7a4a4c50844853ab57c25ee245a63270b3f6048bbab8349634b5a434. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ARG601011788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a9888bec619d89c9f2f291bcf3bd69306595f2458197424cef82ee1105c33c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:40:57Z), 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/ARG601011790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf724d64de6b4b21e14b451bfc71c9af9dd3ee39c0beda8d80057ec9a2c1eafb4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARG601011792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e3e0ad42e0c0944fb2aedbd8ef21cc8c68dd37f398574fc12e915a04895f61. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ARG601011794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdfa0f9ff42454d6ee96f90716b365027e64dd88b6f09fde16cf9f3e40ceeba. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ARG601011795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e400fd8d8d376680f45b253fb70944414f3073406db97cf54d9565c91b57ea1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES71G1842489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a1fb55dfd85b910f2901e4c5b0a45b94b127cac5de1fb01b8894eea33dca28. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES71G1842495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfe2c0525e7fce772002f5ffe0b418d0e28c323df8e64b00b55f3eaf9261629. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ES71G1842500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2eac00cfcd9fdd21d3dc4a1a47413eec9bced3e738ea01b439ff51efefc5b3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARG601101737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cb013737b37397c5bd8225350d4a5d290cff228e966d6c72f407b4f8f94e7b. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/ARG601101742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff77e1c8d3129176c1e6c636f2427474bb49784a1a52f032aacd355fc86a370. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ARG601101745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc27892fc4f196b99dd838f2d33b1bd47e462f3a70efdb8116671cc28f1276c9. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USHM92057404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d75a750f10983b20369272bc859f728fc2be32524922eaacd34d448c48093c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM92057405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553ab4a15d80d6a447dd0c99d900b8636459539aeff6036fe6465e1fb80d44b2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ES71G1842455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4029c413d6c8e6701ac8d1fdd154af8d037ca0e696aa4986f4fac9d8cb09d8eb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:28Z), 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/ES71G1842456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c28d389e1376071e801816790434702ec74e3a3e40f6e9ec7927a618004f0d. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/ES71G1842464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c0d7cdb1a2651429283158e88eecbd96ff21f221c41f44da1b6895ce49587b. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/ARG601011769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88daa1f89e26ea19123d62e704b88ab1fd5e3aabf4086b177eaafb0ddae7321. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARG601011774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc427f92898068dd09d73e1aeab29cf7d96681b350c40e641e0489db57c3809e0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ARG601011775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b4d0d9e7d9e167899c7e0b849e4c420d1be441d1a706ff0d97da1709c34730. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ARG601011776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eceb66a523bb7d54f239c248756717be3ca0072ecab5028725a0b52bf7f2929. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ARG601011777.