The point is, there is no proof that God isn't real. Proof, according to the scientific method, involves things that humans cannot do to address this issue - they can't go back in time and observe the creation (or bringing into existence) of the universe. You need first hand observation, experimentation, and replication of this event. Also, assuming that you are dealing with a person, not an unreasoning phenomenon, you need his cooperation.
However, there is plenty of EVIDENCE that he is real.
What many atheists call "evidence" is not the same as what makes them atheists. The reason for this is that people will usually accept what is in agreement with their world view, and evidence has no such bias.
Acknowledging the existence of a Creator, or, lacking belief in God, are both CHOICES, world view positions, no matter how one expresses it.
This is true of pretty much every philosophical stance, so ultimately, no matter what evidence you or anyone presents, a person must make up their mind and heart. There is great wisdom in this arrangement, because by our choices we reveal who we are, and that is what a super-intelligent God who gave us free will would want for us to reveal.
All I can do is present some of the reasons why people believe in God, specifically in the Creator of all things.
People believe in God because God makes himself known through his works. Also, because just like a house is constructed by someone, the one who constructed all things is God. Thirdly, a real, ultimate Creator, by definition, has to be uncreated, so there must be only one.
The God of the Bible recommends himself to be the Creator because of consistent fulfillment of prophecy. Some have counted well over 1000 fulfilled prophecies that addressed the Messiah, or Christ, alone, and they were all fulfilled in Jesus.
Secondly, every few months a discovery in science or archaeology is made that corroborates some aspect of the Bible's account, indicating the legitimately historical background of ancient Bible events, rather than "once upon a time" type mythical scenarios.
Third, the morality of the Bible's commands about how to live our lives works for everyone - respect for life, respect for property, respect for reproductive powers, respect for truth, and most of all, to put God's service in the center of our lives.
I know how to try to prove that God is not real -- Here is how:
1- Go to every possible existing location in the universe, use every searching instrument possible, invented or uninvented, and acquire the ability to observe and interpret all of the data that you collect, and find nothing.
2 - Then, overcome God's determination that you can't find him in this way, unless he wants you to, and then fail.
3 - Then, give up, just appeal to God in sincerity, and then find him.
Psalm 145:18
18 Jehovah is near to all those calling on him,
To all who call on him in truth.
Acts 17:26, 27
26 And he made out of one man every nation of men to dwell on the entire surface of the earth, and he decreed the appointed times and the set limits of where men would dwell, 27 so that they would seek God, if they might grope for him and really find him, although, in fact, he is not far off from each one of us.
2 Chronicles 16:9
9 For the eyes of Jehovah are roving about through all the earth to show his strength in behalf of those whose heart is complete toward him.
James 4:8
8 Draw close to God, and he will draw close to you. Cleanse your hands, you sinners, and purify your hearts, you indecisive ones.