A system comprises a communications module; at least one processor coupled to the communications module; and a memory coupled to the at least one processor, the memory storing processor-executable instructions which, when executed by the at least one processor, configure the at least one processor to generate a smart contract that includes at least one precondition associated with voice input; deploy the smart contract on a blockchain network; obtain the voice input; and communicate an indication of the voice input to the blockchain network to automatically trigger execution of the smart contract.