Keka or KEKA may refer to: Keka-class patrol boat Keka Ferdousi (born 1960), Bangladeshi television chef and writer KEKA-FM, an American radio station Murray Field (ICAO code:KEKA), an airport 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 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 0x040858ce4a3ba6683441bf66eb8c04ae901fde233c6487a050e2d56bfb2ef3b8. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89ee3e24-7ab7-4162-9275-f296850f1a50.json and https://artists.proofprofile.net/proofs/artist/89ee3e24-7ab7-4162-9275-f296850f1a50.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).