Combine the sour cream, 2 cups of the shredded cheddar cheese, green onions, cream cheese, ham, green chiles, and Worcestershire sauce in a large mixing bowl. Mix until evenly combined.
Slice off the top of the bread to create a lid and set it aside. Using a spoon or clean hands, hollow out the center of the loaf, leaving about a 1-inch-thick border around the sides and bottom. Cut the bread you removed from the center, along with the reserved top, into bite-sized pieces and set aside for serving with the dip.
Spoon the dip mixture into the hollowed-out bread. Sprinkle the remaining ½ cup of shredded cheddar cheese over the top. Replace the bread lid, if desired, then wrap the entire bread bowl completely in aluminum foil.
Bake for 1 hour, or until the dip is hot and bubbly.
Carefully unwrap the bread bowl. Serve warm with the reserved bread pieces, crackers, or chips.
Notes
Nutritional info is for dip only. Does not include the bread bowl.