Thank you.
Those papers are from about the same time frame, but I don't immediately recognize them. I do remember the implementation I modeled mine after was patent encumbered.
I may have adopted "tamper evident logging" because I was talking to a lot of non-geeks at the time and they were familiar with terms like "tamper evident seals".
That MeDShare paper is kinda weird. We were very fortunate to have domain experts (nurses, doctors, admins) on staff. So what we ended up with (after a few years) didn't look much like what MeDShare proposes. For example, access control is a non-starter, because in an emergency no one cares about permission. So the best we could do is log access. Also, demographic data at rest is plaintext, because in the USA there's no GUID, so you need access to all the fields to do record matching (linking) and mitigate poor data quality.
Repeating myself: my interest in tamper evident logging was for legal liability and improving our own QA/test.
I haven't thought much about all the other areas blockchains could be used in medicine, like prescriptions.