Does creating Artificial Memories prove that memories are somehow stored in the brain?

No it doesn't as artificial memories are nothing like a real memory. That is why they are called fake memories. The hopes of many Materialist scientist's is that this will eventually lead to proving the engram theory of memory. That memory is physical traces stored in the brain. However previous failure of this theory should make these scientist's pause that the theory may be wrong. We also have evidence mentioned previously in this blog about terminal lucidity patients who have their memories return to them shortly before their death. This strongly indicates that memories are not stored in the brain.