Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for accessing an electronic contract that includes a provision that is verifiable through control of a remote device. Sending instructions to the remote device that cause the remote device to obtain data representative of whether the provision in the electronic contract has been performed. Determining based on the data, that at least a portion of the provision has been performed. In response to determining that at least a portion of the provision has been performed, causing a term of the electronic contract to be at least partially executed.