The airline transport pilot was landing a tailwheel equipped airplane on a paved, dry runway. The pilot stated that on initial touchdown, the airplane bounced and became airborne. He recovered from the bounce, and added power to cushion the decent. He said that as the right main wheel touched down again, the airplane veered to the left, and continued off the left side of the runway. The airplane then nosed over, and received substantial damage to the wings, fuselage, doors, and rudder assembly. The pilot noted that there were no preaccident mechanical anomalies with the airplane.