Mix the cream cheese, sugar, and cornstarch until smooth.
Add the vanilla, sour cream, and melted white chocolate, mixing until combined.
Beat in the eggs and egg yolks one at a time, then pour the batter into the prepared crust.
Place the cheesecake in a roasting pan, pour boiling water into the pan, and bake for 1 hour.
Let the cheesecake cool in the oven, then refrigerate until cold.