A system and method for verifying digital recordings that have a plurality of tracks. The invention provides a protection system and method that verifies ownership of a digital recording by requiring the presence of the entire or significant portion of the medium (e.g., CD) as it existed when the digital...http://www.google.fr/patents/US20020073317?utm_source=gb-gplus-shareBrevet US20020073317 - System and method for protecting digital media
