OSM objects may include a brand or operator tag, which you can use to derive the brand of a POI.

The issue that exists is that the values of those tags can be spelled differently across several entities (e.g., "McDonalds", "Mc Donald's", or "McDonald's").

There exists a repo that tries to unify the spelling across OSM: https://github.com/osmlab/name-suggestion-index/.

Otherwise, it is an option to find a clean list of worldwide brand names and use string distance measures to connect a POI to a brand.