The Open Data Portal documentation seems to be clear that only hosted data items are marked as being owned by an organization. However, we have clients that develop their own data sets and are the authoritative sources for that data.
Are there any plans to provide signed services in the future? Something where the ArcGIS Online organization has a public key and ArcGIS Server services are signed with a private key so that ownership of the services can be established and reflected in the Open Data Portal data manager?