The copyright detection system is used to detect whether a video is copyrighted or not by extracting the features or fingerprints of a video and matching them with fingerprints other videos. The system is mainly used for copyright applications of multimedia content. The copyright detection system depends on an algorithm to extract fingerprints which is the TIRI-DCT Algorithm of a video followed by an approximate search algorithm which is the Inverted File Based Similarity Search. To find whether a video is copyrighted or not, the query video is taken and the feature values of the video are extracted using the fingerprint extraction algorithm, it extracts feature values from special images called frames constructed from the video. Each frame represents a part or a segment of the video and contains both temporal and spatial information of the video segment. These images are called Temporally Informative Representative Images (TIRI). The fingerprints of all the videos in the database are extracted and stored in advance. The approximate search algorithm searches the fingerprints which is stored in the database and produces the closest matches to the fingerprint of the query video and based on the match the query video is found whether it is a copyrighted video or not. © Maxwell Scientific Organization, 2012.