HOW TO READ TRANSACTION HASHES - A GUIDE A TXID is a cryptographic hash of a blockchain transaction’s raw data. This produces a unique identifier that can be used to identify, track, and prove the existence of a transaction. When given a TXID, Arkham will provide various information about the status of a transaction, who it was sent from, and who it was sent to. Check out our whole article on TXIDs below:(Arkham)