If its an older version than 2.1 then use ipscheck=1 at the end. It will show the license number. It can still be changed. So there's no way to find if it's pirated at all.
I guess all you could do is email Invision support with the URLs and notify them that they are suspected to be pirated versions, and they'll handle it from there.
I guess all you could do is email Invision support with the URLs and notify them that they are suspected to be pirated versions, and they'll handle it from there.