Indeed, fact checking systems are only as good as the link between identity credentialing services and a person.

http://schema.org/ClaimReview (as mentioned in this article) is a good start.

A few other approaches to be aware of:

"Reality Check is a crowd-sourced on-chain smart contract oracle system" [built on the Ethereum smart contracts and blockchain]. https://realitykeys.github.io/realitycheck/docs/html/

And standards-based approaches are not far behind:

W3C Credentials Community Group https://w3c-ccg.github.io/

W3C Verifiable Claims Working Group https://www.w3.org/2017/vc/WG/

W3C Verifiable News https://github.com/w3c-ccg/verifiable-news