ResearcherID is a website where researchers can register for a free, unique researcher ID number and update their profile information, build their publication list, and make their profile public or private. ResearcherID is owned by the same company as Web of Science: Citation Databases from Thomson and integrates strongly with that database. (You can upload details of works not indexed by the Web of Science, like conference papers, books, and book chapters, though these citations won't be calculated as part of citation counts or h-index by the Web of Science).
You can register for a ResearcherID online. You will be sent an email with a link to complete the registration. After providing some personal information, your unique ReseacherID will be sent to your email.
Anyone can search the ResearcherID Registry to view profiles and find potential collaborators.
ResearcherID and ORCID can now be integrated with one another.
Author identities are a solution for uniquely identifying authors, who can publish under multiple names (including maiden names), have similar names and initials, and be cited in different ways with different citation styles. By connecting publications with these unique identities, authors can reduce ambiguity and ensure proper citation counts and other metrics, improving their research impact.