Hi @chiny
No - that is no verification! To make it superclear: You already are a valid member of steemit.com - please do not worry about that. That Member-Card is just a little helper for you. To make it easier for you, to tell somebody about your place (blog) on steemit.com
It is easier to show something, then to talk about it.
You can use your personalized MemberCard in various ways. Some people save it on their Smartphone, so they can show it to friends which can use the QR-Code to find your blog on steemit.com - with no need to search & find, etc.
A lot of people asked me, if I could make a Version of that personalized MemberCard in High-Resolution, so they can print it as a BusinessCard. If you want to know more about that, please read my post about the printable Version of a personalized SteemIT-Member-Card.
You are wondering, how your Data was found? To answer that question: The Data you are saving in your SteemIT-Profile is stored on a public Blockchain. So are all your Posts, Replies (this answer, i.e.), etc. There are numerous Tools to view the information stored on the Blockchain (steemD, steemWorld - my favourite Tool - built by @steemchiller, etc.).
I hope, that was helpful. If there are any questions left: Please let me know. I wish you the very best, enjoy your time on steemit.com :)
Ben.