Twenty-seven-year-old James Marks and 26-year-old James McCormick were arrested in 2011 after executives at Sony Music Entertainment reported security had been breached at their US servers.
Investigators concluded the men used their home computers to search for songs recorded by the late King of Pop and downloaded close to 8,000 files.
The materials included completed and partial songs, videos and artwork from Michael Jackson, the Associated Press reports.
Other Sony Music artists were apparently targeted in the hunt but were not named.
The defendants in September pleaded guilty to two counts of unauthorised access to computer material.
They were sentenced to 100 hours of community service by England's Leicester Crown Court on Friday.
Sony Music has declined to comment on the case.
The global recorded music company has an estimated $250 million deal to sell unreleased material from Michael Jackson, according to the AP.
The singer died in 2009. He was 50-years-old.