If I told you I was from the future, how would you disprove it?

[JohnnyStyng]

I seriously am from the future, 500 years from now. In the future there are no records of the past, because the Machines destroyed it all. In the future there is a war between man and machine, and cats and dogs. People walk on their hands because of the new laws passed by Rex the dog Emperor. I am an agent of the Cat Federation, sent back in time to stop Rex's great, great grandfather from being born.
Can you disprove my claim?

 

[UncleThesis]

Yes, I can disprove your claim.
You see ......the world won't last another 500 years.