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Though Proof never enjoyed much national prominence beyond his membership in D12, the rapper was a pivotal figure within Detroit, energizing the local hip-hop scene in the years predating his unfortunate death in 2006 at age 32. Born DeShaun Holton, Proof was undoubtedly best known for his close relationship with Eminem. The two Detroit rappers were not only part of D12 -- the six-man group that initiated Eminem's rise -- but were best friends, their friendship going all the way back to high school. Proof was such a pivotal figure in Detroit because he often hosted battle-rap competitions, most notably at the famed Hip-Hop Shop, where he hosted Saturday afternoon sessions for years. He later hosted Fight Club, a similar event. Moreover, he was an active participant, nearly winning the 1998 Blaze Battle contest. Such notoriety earned him The Source's 1999 Unsigned Hype award. Proof's role as the city's key battle-rap figure inspired the character Future, portrayed by actor Mekhi Phife...