have journals approve study designs for publication in advance, including all statistical tools to be used; and then you do the study and run the preselected analysis and publish the results, regardless of whether positive or negative

Brilliant.

Maybe a notary service for such plans would become popular from the ground up. Of course, to get voluntary adoption, you'd have to implement a guarantee of secrecy for a desired time period (even though the interests of science would be best served by early publicity, those scientists want their priority).

Let's see, just the right protocol for signing/encrypting, and ... never mind, it will never be used until some high status scientists want to show off ;)