A blockchain process executed by a proposer computing node, including the steps of generating proposed transaction data representing a set of proposed transactions from a group of transactions, where the proposed transactions are distinct from the proposed transactions of one or more other proposer nodes, transmitting the proposed transaction data to a predetermined number of associated verifier computing nodes to verify each of the proposed transactions, receiving, from at least one of the predetermined number of verifier computing nodes, verification data indicating a verification result of each proposed transaction, and generating block data to include one or more transactions of the group in a blockchain data structure, the included transactions being verified ones of: the proposed transaction set of the proposer computing node; and the respective other proposed transaction sets of the other proposer nodes.