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They have proprietary rights to the data. (Longman Dictionary of Contemporary English)

This chapter discusses proprietary rights. These govern people’s ability to use and enjoy both land they physically possess and land physically possessed by others. Whilst technically all land is owned by the Crown, holding an estate in land, and in particular a freehold estate that gives one rights to possess, enjoy, and use the land forever, is tantamount to actual ownership. The other type of proprietary right is an interest in land. Whilst an estate gives one a slice of time to use and enjoy land one physically possesses, an interest gives the right to use and enjoy land physically possessed by another. Proprietary rights can be either legal or equitable in status. (Oxford Law Trove)