EXCLUSIVE

Atlantic Records wants the identity of the person who leaked a song off the "Suicide Squad" soundtrack, and it's demanding Reddit help find the culprit.

In docs, Atlantic says it sent a few digital copies of the Twenty One Pilots track "Heathens" to a tight-knit group ... roughly a week before it was scheduled to drop to the public.

The recipients included the band and several label execs, but the following day the track surfaced online. Atlantic says someone uploaded it to Dropfile.io, then shared the link on Reddit.

Atlantic says it was ultimately forced to release the song later the next day, and therefore lost revenue since the planned marketing campaign was still a week away.