This issue can’t be solved with most of the points described here.
(though I think Snopes is 100% on the mark that this is not about the rise of fake news, it’s about the erosion of trust in “real”
Any set of technically implemented solutions will be targeted using SEO techniques until they are useless or worse. Authority can and will be gamed.
(Ask yourself: how much money would it take to purchase twenty percent of the country’s 100–200 most respected newspapers? Not much these days I’m guessing, and we can assume a few of our country’s most politically motivated billionaires have already been doing this for awhile.)
Source and information transparency is the leading edge of a viable countermeasure.
Unfortunately, commercial news often has competitive goals that make that difficult.