Identifying commercial breaks in broadcast media

A computer program product embodied in a non-transitory computer readable medium, the computer program product comprising computer executable code that, when executing on one or more computing devices, performs the steps of:

• receiving a plurality of hashes of audio content over a data network from a plurality of client devices;
• identifying a number of client devices from the plurality of client devices exposed to a particular television broadcast based upon a similarity of a first group of concurrent hashes from the number of client devices;
• detecting a deviation in a second group of concurrent hashes among the number of client devices;
• inferring a commercial break in which a first group of the number of client devices has changed channel and a second group of the number of client devices have stayed on a commercial break in the particular television broadcast based upon the deviation;
• and
• analyzing averaged data for a third group of concurrent hashes from the number of client devices to determine whether a commercial being played to one or more of the number of client devices is a local commercial or a network-wide commercial.