I am assuming when they say copper they mean a green color, if they meant a brown color, they would say brass right?
At the Statue's unveiling, in 1886, it was brown, like a penny. By 1906, oxidation had covered it with a green patina
Statue of Liberty **
And he's probably still out there, I just watched a sci-fi cartoon where the robot had a really strong battery and was like a 1000+ years old.