Single use URL's?

[eluser]DephNet[Paul][/eluser]
Hi Guys,

I am creating a web app that will take a users email address and add it to a database, now I know how infuriating it is to have someone add my email address to a random site, so I want to implement a single use URL, something like http://site.tld/verify/email/yepHedRafatRuYaj, as part of a double opt-in process.

The process I want to have is as follows:
1) Someone inputs their email address into the site.
2) The application checks to see if the email is actually an email. [working]
3) The application generates a single use URL.
4) The application emails the user a confirmation email, including the single use URL.
5) The user clicks the URL
6) The email is added to the database

Is CI able to cope with single use URLS? If not, what is the best way to go around getting a double opt-in for email addresses using CI?

Many Thanks
--Paul