Creating Triple-layer Cheesecake Hearts can be straightforward if you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 325°F (160°C). Grease and line a heart-shaped cake pan with parchment paper.
2. Make the Crust: In a mixing bowl, combine graham cracker crumbs, ½ cup sugar, and melted butter. Mix well until crumbly. Press the mixture into the bottom of the prepared pan to form a crust.
3. Prepare the Cream Cheese Mixture: In a large bowl, beat the softened cream cheese with 1 cup sugar until smooth. Add the eggs one at a time, mixing well after each addition. Stir in vanilla extract and sour cream until fully incorporated.
4. Divide the Mixture: Divide the cream cheese mixture into three separate bowls. Leave one bowl plain, mix the second bowl with the pureed strawberries, and mix the third bowl with the pureed blueberries.
5. Layer the Cheesecake: Pour the plain cream cheese mixture into the bottom of the crust. Bake for 20 minutes. Remove from the oven and let it cool for 10 minutes.
6. Add Strawberry Layer: Pour the strawberry mixture over the baked layer and return to the oven. Bake for an additional 20 minutes. Let cool for 10 minutes.
7. Add Blueberry Layer: Pour the blueberry mixture on top of the strawberry layer and bake for another 20 minutes. Once done, turn off the oven and let the cheesecake cool inside for 30 minutes.
8. Chill: Remove from the oven and refrigerate for at least 2 hours, or until completely chilled and set.
9. Decorate: Once set, drizzle the melted dark chocolate over the top. Use whipped cream and fresh berries to garnish if desired.
10. Serve: Carefully remove the cheesecake from the pan and slice it into heart shapes using a heart-shaped cookie cutter or knife.

These steps will guide you in creating these incredible Triple-layer Cheesecake Hearts effortlessly.