Tcheka (Manuel Lopes Andrade; born in Ribeira da Barca, Santiago, Cape Verde, on July 20, 1973) is a Cape Verdean singer, songwriter and guitarist, who is well known for his work in transposing the tr
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 0x8b1d3dbfd4850dd7a7e10ead45168933d79a66ac8590884848b77bf962f102e3. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2a321f2-c701-4e26-a745-75ccbda9e8da.json and https://artists.proofprofile.net/proofs/artist/f2a321f2-c701-4e26-a745-75ccbda9e8da.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 0x85e7e02a4b7828bbaabdef3a9de5d27d3161309d791181f66e2a0cb62a5afd92. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:51:07Z), 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/FRX620313080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7a5dca16a13e986e2b9eed0b5fb2cd15636ebe67a473d7de4e95d4d222ca61. 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/FRX620533010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41771aea6ee831148badb10b22b6415036268d2deff67a55d9c29313182dcb6b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX620533020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436a421ee47b6909d2a595ab0c95831b6acb05902fae255aa0704dfcd91fcca7. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/FRX620533060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1337a4a905933cdcf6a802da46f4f4eceb2215f55007e08d0e2fc612f17fb8c0. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/FRX620793060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965af9cccc978c9aa8e121492d81a46aa57235fa801e9e8d3090af2a48538181. 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/FRX621110010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edd140f6376bac2737adf7f90afe028424c7c8ee896e5f75118154a6cbe6ca1. 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/FRX621110030.
Fado pessoano (feat. Manuel João Vieira, Boss AC, Ana Sofia Varela, Paulo Flores, Lura, Tcheka, Zé Ricardo, Manecas Costa, Luanda Cozetti & Ana Firmino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aa0740224e7d3ee0bfe51f518a4d9a39410afbd1cc9406f883246dace90014. 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/PTEM11200244.