It is truly unfortunate that the vast majority of the things we believe are believed on authority. We must remain vigilant, then, possessing the intellectual humility to employ methodological skepticism to our beliefs as well as to the views others attempt to impose upon us.
The knowledge chain you mention evokes a positive phenomenon: Namely, the trust minimization associated with blockchain technology and decentralized systems significantly frustrates the capacity of powerful centralized gatekeepers (e.g., massive media corporations) to manufacture truth. In other words, substantial progress toward achieving victory in this information war is on the horizon!
Although deception may largely reign supreme in the short-term, "...for the truth is powerful and will prevail." - Sojourner Truth
Yup, appeal to authority is a fallacy ;) Indeed, a trustless data bank is a helpful tool, but that only demonstrates the source of an piece of info is unchanged. At least no more fudging of original data sources hehe. It's up to people to verify what is there and will always be there ;)