Persistent identifiers (PIDs) for organizations are useful to get an overview of the publication output of an organization and track the influence of affiliations.

ROR

Crossref, DataCite and California Digital Library and Digital Science joined forces to create the Research Organization Registry (ROR). ROR was launched in January 2019 to meet the particular need of identifying affiliations on researchers’ publications. It is the default identifier supported in Crossref DOI metadata, DataCite DOI metadata, and ORCID. ROR consolidates other identifiers currently in use (e.g. GRID, ISNI, Crossref Funder ID, Wikidata) at a coarser granularity.

CERN ROR: https://ror.org/01ggx4157

ISNI

ISNI currently provides identifiers for over 700,000 organizations in its registry. The ISNI IDs are maintained in a single database which is curated by a network of members and registration agencies.

CERN ISNI:  0000 0001 2156 142X

Ringgold

ISNI has one agency dedicated to the specific curation of organization identities, Ringgold, which manages around 500,000 ISNIs linked to its own proprietary Ringgold Org ID.

CERN Ringold ID: 30531

See more Unique identifiers on Wikipedia