If you are looking to publish in a peer-reviewed journal you will need evidence that stands on two legs, not one, no matter how carefully constructed. Transmutation would be a natural.
Transmutation at higher levels - yes agreed.
Transmutation at very low levels - or measured only on surface - not clear unless the elements transmuted to do not occur naturally.
I am sure that transmutation evidence could be made 100% reliable. I am not sure that is easy.