Muk or MUK may refer to: Muk (food), a type of jelly found in Korean cuisine Muk (Pokémon), a poison-type Pokémon Muk-chi-ba, a variant of the two-player game rock-paper-scissors Motorsport UK, go
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 0xe8f15bf548ba3fea74a648c6d936ae44e4d6afd0150ad2f7838b337330f60c07. Chain 2 (Bitcoin): anchored in block 954055 (2026-06-17T05:51:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/435b2cb6-bb09-4c65-9912-95f4ab9dc226.json and https://artists.proofprofile.net/proofs/artist/435b2cb6-bb09-4c65-9912-95f4ab9dc226.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).