Humberto Carlos Benfica, known as Wazimbo (born November 11, 1948), is a Mozambican vocalist considered one of the greatest voices of Mozambique and one of the most famous marrabenta singers. Born in
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 0xf5cb6cc706e4ae4a72a1c8ab1a0a222a8690407ab2f13973694207b241cdd6db. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd1c1824-5af1-40d5-96ef-81c690baa804.json and https://artists.proofprofile.net/proofs/artist/bd1c1824-5af1-40d5-96ef-81c690baa804.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 0x2205c1175076352767d7c9e34776bfa7481feba176c5f77830b977d31afa2a42. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:49:10Z), 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/DEL120107202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950c370b700f8b29d5dfe7b0830b079bccbe3f8683c108176a8e2c6d47ed4134. 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/DEL120107203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ceb9a66c3172dfa6ca3c22defa222fa60abb6b4e293616fc08ed7f58cea7ad4. 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/DEL120107204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89ac55f635317697e329479d9f597184b2aba4dcbc05235ec6336f7810b4204. 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/DEL120107205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f99afc70c3f0696c52569b20f61943c2ec680d25805d6f98bd2a9801ac831ac. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEL120107208.
Can I Get A Witness? - 30 Years, 30 Artists, 30 Titles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5c2fa03ec9b7ce6c090a3c5d4e552c1dfcbd395619a51702936e729d84071c. 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/DEL120107201.
Luso Noir - Music from Portuguese-Speaking Africa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ceb9a66c3172dfa6ca3c22defa222fa60abb6b4e293616fc08ed7f58cea7ad4. 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/DEL120107204.