Validating your mirror is easy, and can be done in realtime.
Visit http://validator.test-ipv6.com/ and put in your site's address. You can make a bookmark for this with your server name, if you find it convenient; such as http://validator.test-ipv6.com/#server=test-ipv6.com .
Note: We cache files and DNS for up to 5 minutes max. Changes made may take up to that amount of time to be recognized.