"If the user has not yet purchased a license, for example if the user received a copy of the content from another user, the main website will query the user as to the purchase of a license. [0052] In addition, in one embodiment a 128 bit Globally Unique IDentifier (GUID), which is associated with the requested movie file or, in some embodiments, with the movie, is added by main website 306 to the r" . . . .