Qualify
You have to prove yourself at domestic level for atleast three to four years or prove yourself in one season of IPL.
Prove .
If you feel that you need to prove that a pic is not of you, there are a few options. For example, you may take a picture of yourself and your screenname and post it online to prove it to others.
If he cares for you at all.. You won't need to prove it... Just be yourself. If he doesn't like it, he can go elsewhere.
It means that you are supposed to prove something.
Have faith in yourself and sometimes realising the ignorance of others.
If you are trying to keep your dog you have to prove yourself that you can take care of it!
You can if you prove yourself untrustworthy in small tasks repeatedly.
Just be yourself. You have nothing to prove, and everything to be proud of.
Prove
To prove oneself is to establish one's competence or ability. Words expressing this idea include distinguish, excel, and succeed.
to show that your able to do what you've been tasked to do.