Blockchain is only a kind of database, so is Badgechain.
Trevor is absolutely right about recording negative, and, we need granular evidence, metadata and interoperability for BitofTrust data. So that all bits can be integrated for making sense. It’s where I see Experience API, xAPI, comes into play, I mean well-designed xAPI statements with metadata of competency, process records and contextual info., not only S + V + O, not only marking completion/fail at the end of a course. — Jessie