Earlier quoted context omitted.
A usecase for blockchain.
How exactly does blockchain help here? It would allow you to enter a read-only entry that you interviewed a subject and they said XXX, but how would it verify that this is a truthful entry?
See https://blog.archive.org/2018/04/24/addressing-recent-claims...
Besides that there is nothing that prevents us from in the future to store voice/video and digital/biometric signatures and whatever to document interviews or events. For some part it will still be based on trust of a source in others it will be based on evidence. In science based on ability to reproduce methods and data.