KYT check info (#3879)

docs/developer-docs/multi-chain/chain-key-tokens/overview.mdx

@@ -34,6 +34,12 @@ In addition to the requirement that a chain-key token must adhere to an [ICRC](/
     - Builds must be reproducible.
     - The canisters must be immutable or controlled by a DAO, for example, an [SNS](https://internetcomputer.org/docs/current/developer-docs/daos/sns) or a [threshold canister](https://github.com/dfinity/threshold) with a large number of verified voters.
 
+## Know-your-transaction (KYT) checks
+
+The ckBTC minter interacts with a dedicated KYT canister that executes KYT checks. Checks are applied to both incoming and outgoing transactions.
+
+The ckETH and ckERC20 minters implement a local OFAC checklist for both incoming and outgoing transactions.
+
 ## Available chain-key tokens
 
 The current chain-key tokens are supported: