There is no restriction of keeping records of any type in the Blockchain approach. Presently, a lot of organizations all over the world are using this approach and the fact is records of medical transactions, events related to organizations, management activities, transaction processing, identity management, as well as documentation are the common type of records that can be kept on them. It must be noted that the record keeping is not just limited to these applications only.
For example, Governments have income tax details of all citizens, list of people who are eligible for voting in elections, social security details, bank details of all the citizens who pay taxes and some of these infos need to be kept secret. All this info can be stored on blockchain safely and securely, without needeing any additional server and physical papers. This is just an example, blockchain’s applications are limitless.