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Identity protocols can digitize library membership by issuing verifiable credentials for access, borrowing, and participation in programs. Patrons can present these credentials via digital wallets, reducing the need for physical cards or repeated registrations. Libraries can verify age, residency, or student status without storing sensitive personal data. Decentralized identifiers (DIDs) ensure privacy and self-management, while allowing credentials to be recognized across regional or interlibrary networks. This improves access, operational efficiency, and inclusivity, especially for underserved or digitally remote communities.