Check this out. I got this from the Hamodia website. An interview with Rabbi Yenowitz.
(One of the questions)
As a talmid of the Chofetz Chaim, do you remember what he looked like? Is this picture that appears on the popular edition of one of his sefarim a good likeness?
Notice how he says “Perhaps he looked more like that when he was younger.” I recall reading an article (not this one) in the Mishpacha or Hamodia magazine, that interviewed someone who said that this picture was indeed the Chofetz Chaim, but was taken when he was younger. I am currently trying to find that article, if I do I will post it.
Here is a link to the whole interview. (If it gets posted)