To see who it is, follow the link to Betabeat, below. Although, any heavy turntable.fm user will probably be able to guess who it is.
I love the idea of verified artists, as it provides Twitter-like verification of a person who is likely to draw in large crowds/#s of followers. Another clever feature of the verified artist designation is the custom avatar. This first one is quite distinct from other tt.fm avatars and provides a great precedent for future verified artists.
Link (via Betabeat, August 10, 2011): Turntable.fm’s First Verified Artist