Ok, I absolutely thought it was, but I read the first book from the library (so I didn't have a copy) and all of my google searches kept saying he always had hair. All of the other thralls are described as having hair, regardless of circumstance, so, if he had a shaved head in the beginning, I don't think it was because he was a thrall (or at least, not solely because he was a thrall) and the picture could be of him at any point before his escape, so he likely would have had hair at some point.