Álvaro Yuri Alberto da Cunha (born 13 September 1980) is an Angolan singer. He is famous for songs such as “Atchu tchu tcha”, "Tu és o amor", and "Kuma kwa kie". His stage presence has earned him the
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 0xf651e284fae6e6c5f14334949cced04900868850538dce41e0d57f2bae434469. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4485dd7-5bcf-46cc-8077-53d8da6f14e5.json and https://artists.proofprofile.net/proofs/artist/d4485dd7-5bcf-46cc-8077-53d8da6f14e5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).