Hey!
The verification method to see if a character has visited each system in EVE is not baked in, so to speak and the verification is fairly complicated and time consuming.
We are only able to offer verification for the purposes of confirming a new record holder for a Guinness World Record for the specific category of being the fastest to visit each star system without losing a single ship in combat throughout the journey.
The current record holder is Henrique Arnolles and we covered it last year here in this news item below.