Preheat the oven to 325°F (163°C) and grease a 9-in springform pan.
Mix crumbs, sugar, and butter, then press firmly into the pan. Bake for 8-10 minutes; cool.
Heat raspberries, sugar, and lemon juice in a saucepan. Stir in cornstarch mixture, cook until thickened, strain, and cool.
Beat cream cheese and sugar until smooth. Add sour cream and vanilla, then mix in eggs one at a time. Fold in melted white chocolate.
Pour filling over the crust. Spoon raspberry sauce on top and swirl gently with a toothpick.
Bake for 50-60 minutes until set but slightly jiggly in the center. Cool in the oven with the door ajar for 30 minutes.
Chill for 4+ hours or overnight. Slice and serve this decadent cheesecake!