Kook or KOOK may refer to: People Kook (surname) Kook, a slave prominent in the 1811 German Coast Uprising Kook (surfer), a term for a wanna-be surfer of limited skill Media KYKK (FM), a radio s
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 0x549ea93ab1c9bcbc14f6e0f31de98d84fbaadf516d2ede786f41cc645cde852c. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0f2dfa3-9d27-4e76-8877-8bd8b50f0760.json and https://artists.proofprofile.net/proofs/artist/f0f2dfa3-9d27-4e76-8877-8bd8b50f0760.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).