Physical Visual ID as Means to Tie Disparate Media Collections

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for automatically associating collections of media files are provided. A first tying-identifier is determined from at least one media file in a first media collection. A second tying-identifier is determined from at least one media file in a second media collection. The first tying-identifier is then compared to the second tying-identifier. The first media collection and the second media collection are then associated together based on the similarity between the first tying-identifier and the second tying-identifier.