I use it to prove that my legal / important documents aren't faked / altered and existed at a given time. Only Bitcoin (Blockchain Tech) can do that if I am not mistaken.
Why don’t you put multiple versions of your important documents on the blockchain, and then later you can pick and choose which version you want to “prove” are real?
I do not put any document on the chain just a hash. I do only need proof that a certain version of the document existed at a certain time to proof that it wasn't altered after. Multiple revisions are ofc also possible. If you upload the same multiple times the first timestamp is enough, everything after can be ignored.