Proof is a play by the American playwright David Auburn. Proof was developed at George Street Playhouse in New Brunswick, New Jersey, during the 1999 Next Stage Series of new plays. The play premiered Off-Broadway in May 2000 and transferred to Broadway in October 2000. It won the 2001 Pulitzer Prize for Drama and the Tony Award for Best Play. Best Play at the 55th Tony Awards, June 3, 2001 — hosted by Nathan Lane, Matthew Broderick at Radio City Music Hall. Wiki link Wiki link