Short answer: you can't because that's not what it's for.
Link verification shows you are the owner of the target by making you include the attribute "rel". If you aren't the owner of the page/site, it is highly unlikely you could do this. Hence why it's verification that you own it.
That said, we don't put a lot of prestige into the green checks. Ppl who understand their meaning might be like "Ah, okay, that's actually their site, they own it," and that's it. NBD.
Side note: when did you get the verification to work??
I haven't seen ppl add *new* verifications since the DoS attacks a few weeks back.
@DaveMasonDotMe
Well fuckity. Some of us are having some difficulty getting them to function. I thot the script was shot until server updates finish, and that might still be true, but... crap.
/me goes to double check info