Abstract: The present invention relates to associating media through digital watermarking. In one implementation, a method is provided to associate first media with at least second media. The first media includes encoded first plural-bit auxiliary information. The method includes receiving electronic data representing at least a portion of the first media; decoding the encoded first auxiliary information from the electronic data to obtain the first auxiliary information; providing second plural-bit auxiliary information, wherein the second auxiliary information is based on the first auxiliary information; and encoding the second auxiliary information in the second media, wherein the second media comprises an electronic form. Thus, the first media and the second media are associated via the first auxiliary information and the second auxiliary information.