Guys, the person asked for a quick way to verify Satan is real, not where the name Satan comes from or to give him irrelevant links. You didn't answer his question. Be careful, as I've seen a lot of people who give irrelevant links to ToZ that don't directly answer the question someone is asking.
To answer the original question: A quick way to contact Satan for yourself and confirm his reality is focus on his sigil and ask him to give you a sign. After that, for the next hours or days you should be on the lookout for signs. They can come from any source, like a call from a friend, numbers like 666. or anything else.
I could only receive some sign of his existence after many months into Zevism.
For me, the greatest proof of his existence is the ToZ, the people of the ToZ, and our knowledge. This is why I advised to read our material.