Beech F90 pilot reported loss of aircraft control during landing resulted in propeller strike and damage.

Narrative

I departed ZZZ via ocean route to ZZZ. I was navigating via radar vectors to runway XX at ZZZ and landing was assured. While in the flare for landing I made final power reduction at which time the props reduced pitch as if going into beta and the airplane began to sink at an uncontrolled rate. I immediately added power to arrest the sink rate and as the engines gained power the plane experienced asymmetric trust diving the aircraft down and to the right. I was able to regain some control of the aircraft putting it on the runway; straightening it out and finishing the roll out and taxing to the US customs ramp. Once I had cleared customs and returned the aircraft I completed a preflight and did not observe anything unusual. I then flew from ZZZ to ZZZ1 where I stored the aircraft inside in hangar. Two days later I returned to ZZZ1 to perform another walkaround the aircraft and noticed what appeared to be a right engine prop damage. Today my mechanic facility came out and looked the airplane over for damage and concluded that it appears that the right prop had contacted the ground and showed slight damage. None of the pilot or the 3 passengers sustained any injuries.