Fake Shore Drive posted this Chicago Reader exposé on the people behind A bootleg version of Chance The Rapper’s Acid Rap mixtape that made it onto the Billboard Charts.

Fortunately the Acid Rap bootleg includes another piece of information—a UPC bar code, which contains a six-digit manufacturer-identification number. Using a UPC search available through GS1, I traced the Acid Rap bar code back to Music District Inc., a tiny label based in Houston.

According to Music District’s site, there are only a few artists on its roster, including a rapper named Twank (aka Twank Star), whose first Music District album, Twank Is Coming!, isavailable to download from CD Baby. The six-digit manufacturer ID included in the bar code on the CD Baby page for Twank Is Coming! matches the one on the back of MTC’s Acid Rapbootleg. That same manufacturer ID has been used for other MTC bootlegs sold through Barnes & Noble and eBay, including Gucci Mane’s I’m Up and a Lil Boosie compilation calledThe History of Boosie.

Music District owner and CEO Suaran Marshall says the unlicensed releases are none of his doing, and that this isn’t the first time bootleggers have used his label’s bar codes. “I’m pretty sure I know who’s behind it,” he says. “The company is going to be 1-Stop.” Music District’s relationship with 1-Stop hasn’t been entirely antagonistic, though…

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