Preheat oven to 325°F (160°C) and prepare springform pan.
Mix graham cracker crumbs, sugar, and butter for crust and press into pan; bake 10 minutes.
Beat cream cheese and sugar until smooth. Add sour cream, lemon juice, zest, and vanilla; mix in eggs one at a time.
Pour filling over crust and bake 55–65 minutes until set but slightly jiggly.
Cool slowly, then refrigerate at least 4 hours or overnight.
Cook blueberries, sugar, and lemon juice until juicy; stir in cornstarch slurry and thicken. Cool and spoon over cheesecake before serving.