With your permission, ORCID will import articles from Scopus, Web of Science, Europe PubMed Central and CrossRef, among others. Simply login to ORCID, click the Link Works button in the Works section of your profile, then click the link to the resource from which you want to import citations. Only citations with a unique identifier will be imported (e.g., DOI, ISBN).
You can also configure Symplectic Elements to populate your ORCID citation list (via Menu > My Profile > ORCID settings). See further information.