A computer system that interfaces with a blockchain is provided. The computer system receives match data for a match between a first data transaction request that is associated with a first identifier and a second data transaction request that is associated with a second identifier. A first blockchain transaction is generated based on the match data and stored to a blockchain. At least one further blockchain transaction is generated that splits the match into two different transactions—one between the first identifier and an intermediary and the second between the intermediary and the second identifier. These are recorded to the blockchain via the further blockchain transactions.