"Mwaki" is a song by Brazilian DJ and producer Zerb from his third extended play (EP), Surrender (2023). It features Kenyan singer Sofiya Nzau who performs the song in the Kikuyu language. "Mwaki" was
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 0x1130be273ce17b3aef60cc706801af551e61531bb979a2f0ff96761bd64be90e. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b87dba9-b578-4c4f-b585-ffb9dabede0a.json and https://artists.proofprofile.net/proofs/artist/7b87dba9-b578-4c4f-b585-ffb9dabede0a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).