What an easy question to answer.
New American Standard Bible (©1995)
"But if he does not listen to you, take one or two more with you, so that BY THE MOUTH OF TWO OR THREE WITNESSES EVERY FACT MAY BE CONFIRMED.
Pursuant to Common Law, a Persons name is whatever name said Person publicly uses, is publicly known by, is publicly called by, is publicly introduced by, is publicly put forth as being, and publicly conducts business as.

I mean C'mon. Joe Shoemaker, son of Jack Shoemaker, wants to bake pies for a living. Now Joe Shoemaker, son of Jack Shoemaker, is publicly known by, is publicly called by, is publicly introduced by, is publicly put forth as being, and publicly conducts business as "Joe Baker." Pursuant to Common law, Joe Shoemaker is now Joe Baker.

The question is not "Can you prove your identity." The question is "Can the PTB disprove your valid identity."

NOTE: Proof is on the shoulders of the accuser.

Let the accuser bring forth
BY THE MOUTH OF TWO OR THREE WITNESSES EVERY FACT MAY BE CONFIRMED
that one's identity is anything other than what one claims as being his true identity.

He He He, ain't going to happen!!!!