1. A method comprising:accessing, by a receiver of a media device, a media stream that includes a sequence of items of content;
accessing, by the media device, a reference stream that includes reference fingerprints derived from respective segments of at least some of the items of content;
computing, by a processor of the media device, a fingerprint from a particular segment of the sequence of items of content of the media stream;
comparing, by the processor of the media device, the computed fingerprint to one or more of the reference fingerprints;
determining, by the processor of the media device, based on the comparing, that the computed fingerprint corresponds to a particular one of the one or more reference fingerprints; and
associating the particular segment of the media stream from which the fingerprint was computed with a time point associated with the particular one of the one or more reference fingerprints.