Patent ID: 7885427

Claim:
A method for modifying a disc for a consumer to enable the playing of a video recorded on said disc, wherein said disc contains a watermark, said method comprising: receiving a disc from a consumer; analyzing said disc to determine if said disc is legitimate, said analyzing including: determining whether two or more hash units in said video correspond to hash units of a known legitimate video, and if they do, identifying said disc as not legitimate; determining the number of different consumers requesting digital certificates for discs with the same hash units, and if the number of consumers exceeds a predetermined threshold, identifying said disc as not legitimate; determining the number of requests for digital certificates received from a single consumer, and if said number exceeds a predetermined threshold, identifying said disc as not legitimate; determining if a watermark is detected for a portion of said video exceeding a predetermined threshold, and if said portion exceeds said threshold, identifying said disc as not legitimate; analyzing a soundtrack of said video and performing at least one of the following tests on said soundtrack of said video to determine if said disc is legitimate: determining if a soundtrack of a legitimate movie is present in said soundtrack of said video; determining if said soundtrack of said video contains at least a predetermined threshold percentage of said soundtrack of a legitimate movie; and subtracting said soundtrack of a legitimate movie from said soundtrack of said video; generating a digital certificate uniquely associated with said disc and with said video; embedding said digital certificate onto said disc, said digital certificate causing a video player to play said video without checking for said watermark; and returning said disc to said consumer.