Manuelcha Prado (born 10 June 1955) is a guitarist, singer, composer, compiler and troubadour of Andean music. He is also known by many people as "The Saqra of the Guitar". Albums 1981: Guitarra I
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 0xc7cdefa3fcfd5e2f4c86ba95364f646d8232b72ba5fbe8d96ae82c29f212e770. 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/9a95d536-2bd6-43f6-b480-4f8011dc8b45.json and https://artists.proofprofile.net/proofs/artist/9a95d536-2bd6-43f6-b480-4f8011dc8b45.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 0x777eb49df488b90c3cb75a6eefca085752b1b2931b1f6c1429eb9ebb3545d0d2. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QMPKX1425379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f05d683aa4e417717c52a2a98a674d0407c3c0c518cf6a2ff9551963bf747f2. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QMPKX1425381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527d2b9771b416eeb559754fdbfb63f9b9419740c9a6ce23062439d9fdbccb97. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMPKX1425375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc79b3a3ed776d6fa5ed8e7bf7d051b1b4969212dc8767b9a8fd252135f41904. 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/QMPKX1420311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1d2f8396ce854cb913d7764f9ca38c1a2de355e8cf772ef1b29753c8999882. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QMPKX1420312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e068f7ef498aa679ac67a2b703bc1812d7b58d052284e791eac816036f0667. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:40:41Z), 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/QMPKX1420313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77187c25240e6a94931d4fcc0012e080dbf31ff61dfd6254078e8c7139690de6. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QMPKX1420317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88105e38be689c2d05802d363633cfdb045899ecf73ae83efff3f4fb4be1bb27. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:46:29Z), 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/QMPKX1424362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b762fcd3a75b93f47421a47f5bf33ac64bbb275523ce92e8ab49dc92539ee22. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QMPKX1424363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89e2860112024fe7fcbfdf0e7e6a5b85e9c291421a70c0b1bc732ce8a3fc5c4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMPKX1420357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693331289a2d880761fd4524da3e63574e0850f086016fb7c2ef2717956ca7c9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMPKX1420360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8d2da7d0185d4dc8ce2356cf9177aa27503b5c00780bd1ec232f0f424f06a1. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QMPKX1420363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca74639115c537496ba1532db32166efaaba95bc1424376c0a3cbccadd528a2. 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/QMPKX1420368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8ee60d3b5f574cc433181e805a571e91c7faa43644112370f8bd7300137408. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QMPKX1428092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0487e1efe707e194f0c9f12e97fc16d6a0db90e20c7f25f75ab291e92d40cde5. 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/QMPKX1428097.