The security breach occurred in April last year, and Sony announced that as many as 70 million PlayStation Network users’ details may have been stolen. The theft of the Michael Jackson tracks came shortly afterwards, but was not revealed until now.
Sony will not confirm which or how many tracks were taken. The music company paid Jackson’s estate £158million for the rights to his remaining songs, some of which it released in the album Michael in December 2010.
It has not been established whether or not tracks from other artists have been affected by this hack. Two British men are due to stand trial for computer misuse in January 2013.