Pablo Villanueva Branda (born 17 September 1936), known as Melcochita, is a Peruvian comedian and Sonero singer, born in barrio La Victoria, in Lima, Perú. Known in the 1950s as Pacocha, he and his br
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 0xce05ae838cfd1985390d69264730417589cc93fce85bb2f50e7368331740a6eb. 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/1b27044c-cc1e-4836-ae01-3fd5515ce5dc.json and https://artists.proofprofile.net/proofs/artist/1b27044c-cc1e-4836-ae01-3fd5515ce5dc.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 0x57d80e79c3fdce88ef4dab180945639370606864f9d53aa45017956eb6028698. 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/QMFME2397400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaf786efd9cda31ee19ff6c88b8824532423d97236789394a1e5fd27030333e. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QMFME2397528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a95fd487f7d06793a41b751c809c0e7bca410e27ad5aa33506d4cd8b383b8b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QMFME2397529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa87142906ffee598159fac82739d7547683917f1dfba99f0be1da932c8a467. 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/USHM91607815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014c42d1f5513c7614ffe86e13ba50a0e096c3b17bedfe6909fe8ef25f4d716c. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QMFMF2335999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e52b27dce8712e42a5ea1c2695ffef608e419d159ab3aa76edbf095df503b5. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USHM91607810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6cfccbefbd58c67e82ebfb372ef5d932e6f9271ded762b16c014c539dd9268. Chain 2 (Bitcoin): anchored in block 957629 (2026-07-11T23:44:46Z), 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/USJ3V1488949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099814d76198651b92e165a5e94959e64e4be6990630be392fe38b073e83da3d. 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/USJ3V1111434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005dc772dcd3abc9ba5b3cffd88f22ff2da3376ec3511081b08d1dfe3b2ee0fe. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USJ3V1111437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5cf59cb809e50586bb8f69e3c9936972d24c421785ac04a88c53ba7f4d7430. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US3DF2548600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a70982c0c008154759ee893975ac1bbdb14403ce17f82f37b2a5fda15ae72e. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/US3DF2548601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90eacba8a9d877c1bde5e7dc78faeb25e99a91721ff6c6351f7e8aba7789e01d. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/US3DF2548602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c48002e982e0a0e409cd3cf90c5c2f7b094e7b5569273ed20ab4741372ed231. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US3DF2548603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc998f045c0c5e1f6497b4062c5d5c398380db36a73ab27d7c930ed9aee965b. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/US3DF2548604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d46b991af20423a97f2b28660a8946fc1e38557f87ce108eaa1b29522999f2. 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/US3DF2548605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7067f017669c0d988421d868d5c8d661d0c00a9f14c049985ee17d50f5d6f390. 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/US3DF2548606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe475b4ec9f1ccff1ecd863891412d918c6ce923e1b9215f3b187e47c62837195. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/US3DF2548607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d714d2e521a339b9e9dc400e7d87793bd37e606312b60162b184cee9c0b70a. 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/US3DF2548608.
Mix Matancera: Momposina / Las Muchachas / El Muñeco De La Ciudad / La Mamá y La Hija
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ffc7aaf3d48e1ffcbb216949368234de78e80f8dc3e224df1ae1c7cc2eb02e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/US3DF2548609.
Valdesa Records Presenta Vol. 1 Salsa Sudada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35864ff2643118363c17086b998ce52650f61ee93b4a8b8102fd5576f4597018. 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/QZWDW2367230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bf4e65771532e80b0b42914ee9247b0cb82ca4dff8fc6d3ab507de279111df. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USJ3V1185065.