1996 Honda Civic piston rings rusted to cylinder?

Engine Mechanical problem
1996 Honda Civic 4 cyl Two Wheel Drive Automatic 115k miles

I took the cylinder head off and had it reconditioned. Before the engine was turning fine, to do compression check and to bring to tdc. The cylinder head was gone for a week or so. I just put it back in and new timing belt. The crankshaft pulley wont budge. Took the timing belt off and tied to turn the engine with a wrench but it wont budge. The #1 cylinder is at tdc and all four valves are fully closed other three cylinders are in lower position so there is no piston hitting valve situation. I am thinking
when the cylinder head was off my son probobly left hood up in rain and pistons got wet. He says he dried them but. If the compressin ring rusted to the piston how can I koosen it without breaking? Is there a remedy or any other advice? I would greatly appreciate any help. Thanks in advance.