1. A method comprising: receiving, at a computer system comprising one or more computers, from a first electronic device, a first electronic media work; extracting, using the computer system, one or more features of the first electronic media work; determining, at the computer system, that at least a portion of the first electronic media work corresponds to a first reference media work based on a matching of the extracted one or more features of the first electronic media work against a database of reference features extracted from a plurality of reference electronic media works including the first reference media work, using an approximate nearest neighbor search which is a sub-linear search of the database of reference features that identifies a match within a threshold of at least one of the reference features to the extracted one or more features of the first electronic media work but does not guarantee to identify the closest match to the extracted one or more features; receiving, at the computer system from a second electronic device, a query related to the first electronic media work; linking, by the computer system, the query to action information in an action database based upon the determining that at least a portion of the first electronic media work corresponds to the first reference media work, wherein the action information comprises information related to a URL and is related to an action to be performed at the second electronic device; generating, by the computer system, machine-readable instructions associated with the action to be performed based at least in part on the linking of the query to the action information; transmitting, by the computer system to the second electronic device, the machine-readable instructions; and logging, by the computer system, an event associated with the machine-readable instructions.