To link works from another system, choose Search & link from the Add works menu in the works portion of your record:
Select a system from the list (CrossRef is a good general source, others will depend on your discipline). You'll be asked to authorize the system, and will then be able to identify works in that system that are yours and that you would like transferred to your record. Each system behaves a little differently, and there may be a couple of intermediate steps not described here. For more information, see Add works by direct import from other systems in the ORCID Knowledge Base.
To import a BibTeX file of your works, choose Import BibTeX from the Add works menu in the works portion of your record, and import the file. For more information, see Importing Works from a BibTeX File in the ORCID Knowledge Base.
To manually type in information about your works, choose Add manually from the Add works menu in the works portion of your record, and complete the form to describe a work. For more information, see Add works manually in the ORCID Knowledge Base.
To add other kinds of information to your ORCID record, see Get more out of your ORCID iD.
If you cannot find your citations in Web of Science, Scopus, CrossRef, Google Scholar or another database, you can enter them manually. Under either "Funding" or "Works" in your ORCID profile, navigate to "Add manually." ORCID provides some 37 work types that you can choose from when listing citations. These include categories like artistic performance, data set, invention, lecture, and license.
You may control how much of your ORCID record is publicly visible. For both your personal information and information about your 
works, three settings are available:
For more information, see Visibility Settings in the ORCID Knowledge Base, and ORCID's privacy policy.
Under "Works," you can add your publications, performances, reviews, and other academic works in one of three ways. First, you can import citations from databases.
To begin, in the "Works" section, select "Add Works" and then "Search and Link." You will see a list of databases that allow import directly into ORCID. Depending on where you have published in the past, some of these options may be more helpful to you than others. Strong options include:
1.) ResearcherID: Allows you to import citations from Web of Science
2.) Scopus to ORCID: Allows you to import citations where you've published with Elsevier
3.) MLA International Bibliography: Allows you to import from MLA International Bibliography
4.) CrossRef Metadata Search: Allows you to import from a registry of more than 70 million articles, conference proceedings, books, and book chapters that have received DOIs upon publication