LCCN Permalinks are persistent URLs for bibliographic records in the LC Catalog and authority records in LC Authorities. These links are constructed using the record's LCCN (or Library of Congress Control Number), an identifier assigned by the Library of Congress to bibliographic and authority records. LCCN Permalinks are also available for citation records in the Handbook for Latin American Studies (HLAS). [from homepage]

Prefix
lccn
Links
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Pattern for Local Unique Identifiers

Local identifiers in Library of Congress Control Number should match this regular expression:
^\d+$

Example Local Unique Identifier
2011488555   Resolve
Pattern for CURIES

Compact URIs (CURIEs) constructed from Library of Congress Control Number should match this regular expression:
^lccn:\d+$

Example CURIE
lccn:2011488555
Contributors
Providers

A provider turns a local unique identifiers from a resource into a URI. Many providers are also resolvable as URLs (i.e., they can be used in a web browser).

The local unique identifier 2011488555 is used to demonstrate the providers available for Library of Congress Control Number. A guide for curating additional providers can be found here.

Name Metaprefix URI
Library of Congress Control Number lccn https://lccn.loc.gov/2011488555
Bioregistry bioregistry https://bioregistry.io/lccn:2011488555