KK, K.K., kK, k.k., or other sequences of two k's with or without punctuation may refer to: Arts and media KK, the production code for the 1967 Doctor Who serial The Faceless Ones "KK" (song), a 201
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 0x5b028bee1a2b9f9d7983a2fb84acb5489c53173e9c620b9c3ab5edb2ce904600. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/764ca6d4-1af9-4540-bc9b-bf3b4d220918.json and https://artists.proofprofile.net/proofs/artist/764ca6d4-1af9-4540-bc9b-bf3b4d220918.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).