Of course, you are using a proxy, of sorts. Netflix has no way to know where any tunnel actually goes. That's what they require to keep the content nazis happy. It doesn't matter where you live, only where you're watching.
HE only reports the (unverified) account holder address via whois. That's not necessarily where the tunnel goes. And those using the service to get around region locks can easily make up an address within the region they wish to appear.
It's unfortunate, but it's not a problem that can be easily solved. (read: not going to be solved) Either your IPv4 endpoint address would have to be published, or each tunnel would have to be permanently attached to an IPv4 address. The former would require a new API which would have to be queried on nearly every connection, given the speed with which a tunnel endpoint can be changed. The later means no more dynamic updates, when your address changes, a new tunnel must be created. (even that assumes IPv4 subnets don't get reassigned, which they do.)