That's the real Joe Biden. Notice the blue eyes, ear lobes not attached, large distance from upper lip to nose and the lack of liver spots on the left upper side of his face.

Contrast that photo with the "Joe Biden" you see today. Black (or dark) eyes, ear lobes attached to the head (pixie ear), short distance from upper lip to nose and several liver spots on the left upper side of his face.

The fake Biden took the oath of office. You can see that from the inauguration photos.