Has the Higgs boson been proved?
The Higgs Boson, also called "The God Particle" is presumed to be the particle responsible for the Higgs field which is an energy field that permeates the entire universe and for a good many years it was anticipated that a boson had to be associated with this energy field because all energy fields have an associated boson.
There is little debate as to whether it has been found or not. CERN asserts that as of March 2013 the Higgs has been found, and a CG Image of a Higgs Event can be seen on that particles page on the WikiPedia.
My personal opinion is that there is no Higgs and what was found was the Cosmological Constant of the expanding Universe and the the CERN physicists, using the incredible ATLAS Calorimeters, simply recorded an instant of the universe's expansion as exposed through the intense pressures used in the LHC experiment.
My opinion is unimportant as the scientific concensus is that the Higgs has been found. Stephen Hawking paid up, conceding that he had lost a $100 bet with Gordon Kane of Michigan University as to whether the Higgs would be found but that was a year before CERN asserted assuredly that the LHC had in fact identified the Higgs.
The scientific consensus is that yes the Higgs Boson has been found.