Thinly slice potatoes and set aside.Mix sour cream, can of soup,paprika, salt and Worcestershire sauce together in a large bowl.Add thinly sliced potatoes to the mixture and mix until all potatoes are well coated.Spoon ½ of the potato mixture into a crockpot sprayed with cooking spray.Top with ¾ cup of shredded cheese.Repeat layer with remaining potatoes and cheese.Cook on HIGH for 3.5 to 4.5 hours (or on LOW 6 to 7 hours). Serve topped with a sprinkle of paprika and chives.