A balance and control system may write a data file transfer confirmation from a transmitter system to a blockchain in response to the transmitter system transmitting a data file to a receiver system with the confirmation including a transmitter system address, a receiver system address, and a first hash of the data file. The system may also write a data file transfer acknowledgement from a receiver system to the blockchain with the acknowledgement including the transmitter system address, the receiver system address, and a second hash of the data file. The blockchain may execute a smart contract to compare the first hash of the data file to the second hash of the data file to identify an out-of-balance file transfer event. A monitoring device of the B&C system may read the out-of-balance file transfer event from the blockchain.