KKM may refer to: Knaster–Kuratowski–Mazurkiewicz lemma, in mathematics Kyo Kara Maoh!, a series of Japanese light novels Kola Kolaya Mundhirika, a 2010 Tamil comedy film KKM, a song by the music
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 0x368e15bab4ee2a06cdb29cc0a735d55f965c2f6dbc1c1f606bba086cbc06c0fe. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2371d28-8dd8-402e-beed-1c83a06838a1.json and https://artists.proofprofile.net/proofs/artist/c2371d28-8dd8-402e-beed-1c83a06838a1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).