Great, so, to start with, point it at a public pool to prove you have that much hashpower.
Hello, sure no. We not will inform any details. Its is our anonymity. You can call us as you want. If you to join you are welcome, if not, no problem, we will still mining and get earnings.
Best Regards
You could easily demonstrate you have that much hashpower without exposing your identity.
What possible justification do you think you have for refusing? If you can do so without anybody knowing who or where you are, why do you think it is acceptable for you to refuse to show any proof whatsoever?