Heat oven to 375°F. Line a large baking sheet with parchment.
Soften cream cheese if needed in the microwave for 10–15 seconds.
Beat cream cheese with sour cream until smooth. Stir in chicken, cheddar, green onions, garlic powder, onion powder, paprika, salt, and pepper.
Unroll crescent dough and separate into triangles. Gently stretch the wide end for easier filling.
Spoon about 2 tablespoons of filling onto the wide end of each triangle.
Roll from the wide end toward the tip, tucking sides to enclose. Place seam-side down on the sheet.
Brush tops with melted butter. Sprinkle breadcrumbs evenly over each roll-up.
Bake 18–22 minutes until deeply golden and heated through. Rest 5 minutes, then garnish with parsley and serve.