Conduct the following completely and accurately:
You can not copyright data, but you can copyright an expression of the data like a table or chart in a book. If this raises concerns for you, re-consider data sharing.
Data providers may license data with limits on how the data can be used (e.g., forbidding for-profit use or requiring attribution).
Laws about data vary outside the U.S.
Review the data requirements by your funding agency and any other research requirements at UC Berkeley.