They have been described as Hollywood"s digital detectives and they have a warning for anyone illegally trading music or movies: "You can run but you can never hide."
Mark Ishikawa: We have a very high effectiveness rate Mark Ishikawa, a former hacker, is the CEO of BayTSP, arguably one of the most recognised and biggest companies working in the business of patrolling the web to unmask violators of copyrighted music.
From his Silicon Valley base he told BBC News Online: "There is no lock that can"t be picked and our technology ensures that there is not a rock in the world you can hide under if you are sharing files.
"If you have an active internet address or connection and you are actively sharing files, our spiders will find you."