Each scientific search platform has its own system to link publications to a specific author. The following instructions show you how to create author IDs and associated profiles. You can also use these IDs to calculate your h-index.
Web of Science - ResearcherID
Web of Science (WoS) lets authors create their own profile, a ResearcherID. If you have a ResearcherID, your publications are easier to find when people search for your name. Once you have created a ResearcherID, you need to manually add your papers to the profile. You can then use your ResearcherID to fill your ORCID. You can also easily and to easily calculate your h-index in WoS.
Scopus automatically groups publications that have the same author, affiliation, and subject area. Every separate set of publications is assigned a Scopus Author Identifier. As such, you may have more than one Scopus Author Identifier. But, you can have Scopus merge these profiles into one. You can then use your Scopus Author Identifier to fill your ORCID or to calculate your h-index.
Google Scholar lets you create a profile to list all your publications. Google Scholar automatically assigns publications to your profile. You can manually add publications and remove publications that have been assigned incorrectly. Your h-index is also shown in your profile. This index is based on all your publications and citations in Google Scholar.