"There isn't a good set way to prove it verbally-- risk of memory copies and all that."
He automatically tenses and darts a glance over to Ianto at the mention of... that year... and then he looks back to the possibly-Doctor. He holsters his gun, at least, but holds up the arm that his wriststrap is on. "I'm going to run a few scans while you talk. Basic biomed profile, artron levels, that sort of thing."