Tailwheel Pilot reported a loss of directional control on landing resulting in a runway excursion and a ground strike. Reporter stated brake system was squealing on touchdown.

Narrative

On a flight from ZZZ to ZZZ1 a loss of control event occurred during landing. No problems were noted during flight. During landing on Runway XX experienced loss of control that ended in the aircraft in a ditch and prop strike that stopped the engine. I set up to land for a wheel landing. It felt like I might have come in a little fast but not abnormally. The Loss of Control started with a swerve to the left; then back to the right; slightly back to the left and a hard right that causes the plane to end in a ditch to the right of the runway. Because of the shape of the ditch the prop was brought to a stop from soft dirt. The crew was unharmed and after an inspection of the plane saw no damage evident. At the advice of an A&P [the aircraft] was pulled out of the ditch and was started to taxi to the ramp. I have about 10-15 landings in it and the winds were a slight left crosswind but at about 6 kts. It felt like the brakes were some what active during landing as some squealing was noticed during touch down but stopped after a moment.