I’m a long time contributor of OpenStreetMap, and thought there is an obvious opportunity for OSM and OCM to work together.
Needless to say, I’m not the first! There is a page on their wiki with some discussion - https://wiki.openstreetmap.org/wiki/OpenChargeMap - mostly about the legal technicalities (licensing of data, etc). The discussion is a couple of years old though - so I’m wondering if there has been any more activity or follow-up on this. And also though I would create this thread on the OCM side for a bit more awareness!
If nothing else, OCM users may want to be aware of the structure of the data used by OSM for charging stations - https://wiki.openstreetmap.org/wiki/Tag:amenity=charging_station. I’m thinking, maybe a field for OCM reference (e.g. OCM-98064) may be useful in tying the two databases together?