It has not been "proven." It has been hypothesized and for the most part the hypothesis has a goodly chunk of evidence to support it. However, there are dissenting voices and they also have evidence to support their stances (personally, I think their evidence is slightly shaky). Once again, you seem to have this "thing" for proof. Proof is a mathematical term; preponderance of evidence is a scientific method.
There you go again, with your phony semantic arguments. Look up the word proof in the dictionary, it applies to a lot more than mathematical proofs. People are everyday proven guilty in courts of law without any mathematical proofs at all.
However, I am glad that you at least admit the statement that homo sapiens has no ancestors and hence did not descend from monkeys, Neanderthals, or any other species is correct.