Namecheap and their whoisguard have already been sending out annual or bi-annual emails asking you to confirm that the address details are correct, but it sounds like those emails will contain some confirmation link in the future.
Those were basically a way to nudge name holders to ensure the details they provided were correct to minimise the chances to people lodging WHOIS inaccuracy complaints with registrars or directly with ICANN. See here: http://www.icann.org/en/resources/compliance/complaints/regi...
What's changed is that the Law Enforcement Agencies have pushed to make registrars be proactive in checking that any contact information is accurate rather than reactive in response to complaints. It's likely going to push up domain costs quite a bit. Here's what registrars on the 2013 RAA are required to do: http://www.icann.org/en/resources/registrars/raa/approved-wi...
Right now, they only ask for confirmation once a year regardless of whether there has been any change of contact info. But OP makes it look like I'll have to verify my email address every time it changes, and one of the main features of WhoisGuard is that the email address in my whois changes all the time.
If I tell NameCheap/WhoisGuard to rotate my email every day (probably overkill, but it's possible), will I wake up every morning to find a new confirmation link in my inbox?
You'll only have to confirm any underlying email changes in your example. However, the new ICANN contract also mandates a yet to be defined "Privacy and Proxy Accreditation Program", which will bring changes to the different whois privacy services that registrars currently offer.
I wasn't really trying to answer your question, just adding context.
As far as I know, the address confirmations are for your real address details. Namecheap isn't asking you to confirm the whoisguard details, and presumably the new provisions will function the same way.
