Melt chocolate chips in the microwave in 30-second increments, stirring after each heating until smooth (this should take about two minutes), and allow to cool slightly.
Beat room-temperature cream cheese in a large bowl with an electric hand mixer for about 3 minutes, until light and fluffy. Scrape down the sides of the bowl, then beat in the sugar and cocoa powder until well incorporated.
Next, beat in the melted chocolate and vanilla extract. Scrape down the sides of the bowl. Then, beat again until there is no white remaining in the filling.
Then, fold one entire 8-ounce container of Cool Whip into the cheesecake filling until completely incorporated and no white is visible.
Remove the crust from the freezer and use a large ice cream scoop to transfer the filling into the pan. Then, use a knife or small silicone spatula to smooth the filling into an even layer.
Top the cheesecake filling with the other 8-ounce container of Cool Whip. Smooth the Cool Whip into an even layer, then top with some shaved chocolate curls.
Refrigerate covered for at least eight hours, or overnight before serving. Before removing the sides, run a knife along the indie of the pan to more easily release the cheesecake from the pan. Once the sides are removed, transfer the cheesecake to a large serving platter or cardboard cake round. Then, carefully slide a knife between the parchment and the bottom of the cheesecake in a clockwise manner around the entire cheesecake to release it. You should then be able to easily slide the parchment out.
Yield 12 servings