From what I understand about blockchain, these databases are append-only, right? Meaning someone can't go back and alter the past entries? That kind of assurance could be really useful in this space.
you can build document versioning into a blockchain-backed protocol - I would assume that Digibuild have done this as documents can be both corrected and extended over time. The important factor being that the old version is not erased and thus you can see the history of the document, which could be beneficial.
By uploading said information you are claiming it is true. Whether other people believe it to be true depends on whether they trust you or otherwise have verified for themselves (which can also be asserted cryptographically).
No digital technology can solve epistemology and tell you what is true - but that's not the point, and blockchain applications are not unique in this.