Kanye West's Record Label -- Hunting Down 'Yeezus' Album Leaker

Kanye West's record label Def Jam is on MAJOR damage control right now -- after the rapper's new "Yeezus" album leaked online -- but here's a shocker ... we've learned Kanye's completely unfazed that his album dropped early.

Sources close to Def Jam tell TMZ, leaks like this aren't uncommon -- especially in the digital age -- in fact, the record company has a special leaks division that deals with problems just like this.

"Yeezus" was scheduled to drop June 18, but the entire album has already surfaced on the web.

According to sources, the leaks division employs various methods to track down the source of a leak ... as well as to put a stop to any further illicit file sharing. We're told the record company already has a lead on who's behind the leak and plans to take swift punitive action.

As for Kanye -- we're told he's cool as a cucumber.