ORCID provides digital identifiers for researchers that allow for their works and activities to be discoverable and attributed correctly. Implementing these identifiers in peer review workflows can enhance discoverability of reviewers and make review activities measurable. Over 1.3 million researchers have registered for an ORCID identifier, which are associated with works, affiliations and organizations. ORCID is working on embedding identifiers in publishing and grants to automatically link researchers to their professional activities.