If there is any proof one way or the other it can only be proven and accepted from the stand point of 'this' life, regardless of the results. If the evidence shows that it isn't real, how would you know? The reality of life doesn't shut on and off like a light switch for the convenience of proof. Life is either real or it is not, so you would have to first suggest how to prove it or not before seriously presenting the question.
The idea of solipsism, which I believe is widely misconceived, does not suggest any method of proof of reality. In fact the definition of solipsism implies little to nothing about reality at all. According to Webster's Dictionary the definition states, 'since all knowledge is subjective, the self is the only thing that can be directly known.' The ideology is more about 'knowledge' than it is 'reality.' The definition does not directly suggest that only the self is 'real' or anything outside the self is 'unreal'. The term is adopted and discussed in intellectual circles as if it does so which is where the misconception comes in.
Solipsism is an epistemological argument, rather than an ontological one. It is also in accordance with something I always state here regularly, which is, "the only way to 'know' anything means to identify with and be the known." Using the mind and intellect, one can only know 'about' knowledge. Knowing about China is not the same as being there or what it means to be Chinese.
Another limitation imposed on the subject is the idea of proof, which is limited to the linear paradigm of material form and content, which defines difference and appearances. Because the mind does not register the nonlinear paradigm of formless context, which defines essence and meaning, the abstract cannot be proven by conventional means, nor is it subject to it. The presumption that life is strictly or entirely material in essence, leads to the notion that it is subject to proof. Things like life, love, peace, justice, etc., are formless and non-material, and therefore cannot be proven nor disproven.