Preheat oven to 375 degrees F.
After baking the bread according to package directions, cut into 48 slices. Spread butter on each side of slice and toast in grill pan, each side. You can also toast in the preheated oven for 1-2 minutes if you don't have a grill pan.
In a large bowl, blend crabmeat, mayonnaise, and cream cheese. Once evenly blended, add the Parmesan cheese, Old Bay seasoning, sea salt, Tabasco sauce, lemon juice, and white pepper.
Spread crabmeat mixture on individual toasts and arrange evenly on a baking sheet. Bake in the middle of the preheated oven until puffed and golden, about 10-15 minutes. Serve warm.