1. A system comprising: a memory; a processor coupled to the memory; and at least one analysis module executed from the memory by the processor to: receive a portion of audio data of a broadcast signal, wherein the portion of audio data comprises a plurality of unknown works, generate a segment representation of each of a plurality of segments from the portion of audio data, wherein the plurality of segments comprise portions of the plurality of unknown works, transmit the segment representations over a network to an identification (ID) server, wherein the ID server is to identify the plurality of unknown works based on identifying one or more of the segment representations that correspond to one or more segments of a plurality of reference works, to generate separate playlists for two or more of the identified works, the separate playlists each identifying broadcast instances of a single identified work, and to output identification of the one or more of the segment representations that correspond to the one or more segments of the plurality of reference works responsive to identifying the one or more segment representations that correspond to the one or more segments of the plurality of reference works, and purge the one or more segment representations that correspond to the one or more segments of the plurality of reference works responsive to receiving the identification of the one or more of the segment representations that correspond to the one or more segments of the plurality of reference works.