I think this is key:
Establishing a new role in institutions, as @waddink suggests, would be ideal in theory, but in practice, at least in some parts of the world, there is only one person in charge of a collection (even of a whole, small, museum!), having to fulfill the roles of curator, manager, “IT” person, communicator, etc., all on their own. Adding another role for those people could represent more burden than help, so the ease to create and maintain records should be of high priority.
There probably is something to be said also about recognition of the efforts associated with roles, which could encourage people to actively take those roles. If there could be a way to credit people (not in the “oh, yes, thanks for what you do” way, but something a little more “formal”), taking up new roles may be more appealing. I guess this is more towards the social side of issues, but I think very related to the sense of ownership.