It's extremely unlikely that such database rights are an issue as ISI (Institute for Scientific Information, now part of Thomson Reuters) has been compiling thi

It's extremely unlikely that such database rights are an issue as ISI (Institute for Scientific Information, now part of Thomson Reuters) has been compiling this sort of data since 1960, as well as many other indexing services. If database rights were an issue then they would have sued each other already and settled things long before Google Scholar.