Or take a look at these reference implementations:
A Guide to KILT Identity Components
KILT provides a framework for issuing self-sovereign, verifiable credentials and DIDs (decentralized identifiers).
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KILT’s TypeScript Software Development Kit (SDK) allows developers with no blockchain experience to use KILT to build a business around identity.
Using the open-source SDK, applications for issuing, holding, and verifying credentials can be quickly built and customized without great expense.
KILT provides a framework for issuing self-sovereign, verifiable credentials and DIDs (decentralized identifiers).