Want to prove that you're saved? Then obey God. Here's today's Bible Minute.
In 1 John 2:3 we read, "Now by this we know that we know Him, if we keep His commandments." One of the proofs of salvation is, you keep the Word of God. Look down at 1 John 2:5, "But whoever keeps His word, truly the love of God is perfected in him. By this we know that we are in Him."
Now, do I keep every commandment of God perfectly? Not in your lifetime! It is true, however, that I do not have to sin now the way I did before because I have God's Word to teach me what is right and what is wrong. So, one of the evidences that you are born again is this: you want to keep the Word of God.
If you want to do what God says, start with His Word, and backtothebible.org.