1. A method for uniquely identifying a copy of an audio-visual program recorded in an electronic recording medium or optically recorded form, said method comprising: selecting a master version of an audio-visual program to be copied; making at least one copy of the master version of an audio-visual program such that each copy includes its own unique identification; and embedding the unique identification into each copy of the audio-visual program when making each copy of the audio-visual program by performing the following steps: (a) altering visible images appearing at selected ones of a plurality of different locations in said master version of an audio-visual program by enlarging an image in at least one frame in each of said selected locations; and (b) selecting said ones of said locations in each copy to create a unique pattern of enlarged images in each copy to uniquely identify each copy.