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You are right, I didn't even think about it. On the other hand, I understand his point. I can make another pub key and see if he's willing to test his method with me or not.
Just sign a message with the privatekey to proof that you own the privatekey for the pubkey without exposing it.
Post the signature with the used message. Without knowledge of the message the signature can be forged.
Excellent idea!, thank you; now I just need to know if mcdouglasx is willing to play along.