Can you elaborate on what seems unconvincing to you?
I am not convinced with your term purport in my reputation page. For revising this, what should I need to do.
I did the maximum available method to prove my ownership. But in your comment, you sound like I have manipulated to pretend like.
Simply, why not your comment could be like "he signed a message to show ownership", instead of "he signed a message p
urporting to show ownership".
FYI:
https://dictionary.cambridge.org/dictionary/english/purportto pretend to be or to do something, especially in a way that is not easy to believe: