"Killa Killa" (edited for radio as "Thrilla Thrilla") is a song by English YouTuber and rapper KSI from his debut studio album, Dissimulation (2020). The song features a guest appearance from British-
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 0x6067120bc5ac53138d7e816a73229025ac1f1e0146d32ecbfc98739878c21f45. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbcfda86-34f9-4641-9b9c-5bc86b0ac521.json and https://artists.proofprofile.net/proofs/artist/fbcfda86-34f9-4641-9b9c-5bc86b0ac521.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).