Good Morning Team!

I am in need of a little bit of assistance. I just need to confirm what I am trying to do is possible. 

I have built a CloudPage - on it, it asks for Mobile Opt Ins. Once they contacts hit 'Verify' I want to have them sent to our secure site (if they are not Opted In) and just send a "Thank You - Already Opted In" message (if they are already Opted In) 

I am assuming that I can accomplish this with some AMPscript referencing a Data Extension that is updated with all Mobile Opt Ins. 

If you could also point me in the right direction on how that AMPscript would look - THAT"S BE AMAZING! I have most of it written out, but any insight or other ideas is more than appreciated!

THANKS!

- Kevin Ringham