Open Standard by DIF Labs

LinkedClaims

Decentralized verifiable claims on the AT Protocol

Publish signed claims about any URI-addressable subject — people, websites, credentials, or other claims — and let anyone verify them. Built on the AT Protocol, no central authority required.

Get Started View Live Claims
ATProto
Protocol
Any URI
Subject
Open
Standard
Overview

What is LinkedClaims?

LinkedClaims is an open specification from DIF Labs for making verifiable claims about any URI-addressable subject. A claim can be about a website, a person (identified by a DID), a credential, or even another claim — enabling a web of trust where endorsements, disputes, and ratings layer on top of each other.

Claims are published as records on the AT Protocol using the com.linkedclaims.claim lexicon. Every claim gets a persistent URI, is signed by the publisher's ATProto identity, and is readable by anyone via the public API — no backend or special access required.

Example Claim
typeendorsement
subjectdid:plc:alice...
statement"Excellent contributor to open source"
confidence0.95
stars★★★★★
Capabilities

Key Features

Claims About Claims

Any claim can be the subject of another claim. Endorse, dispute, rate, or supersede existing claims to build a layered web of trust.

Multiple Signing Methods

Claims can carry embedded proofs from MetaMask, Ed25519, JWS, or any signature suite — preserving the original signer identity.

Evidence Support

Attach photos, videos, documents, or links as evidence. Each item can include a content hash for integrity verification.

Confidence & Ratings

Express how confident you are (0–1) or give a star rating (1–5). Aspect tags let you rate specific dimensions.

Persistent URIs

Every claim has a stable claimUri that can be referenced from any system. Claims flow on ATProto but are not exclusive to it.

No Backend Required

Read claims directly from the ATProto public API. Embed the web component on any page — zero server-side infrastructure.

Schema

Lexicon Schema

The com.linkedclaims.claim lexicon defines the structure of every claim record on ATProto.

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Live Data

Live Claims Feed

Real claims from the LinkedClaims ATProto repository, loaded directly from the public API. Use the search box to filter by subject.

Resources

Get Started

claim-atproto SDK
TypeScript SDK for publishing and reading LinkedClaims on ATProto.
npm: @cooperation/linkedclaims
Install with npm i @cooperation/linkedclaims and start publishing claims.
LinkedTrust
LinkedTrust
Web app for browsing and creating claims with a visual interface.
DIF Labs Spec
The LinkedClaims specification from the Decentralized Identity Foundation.

ATProto Domain Verification

To verify linkedclaims.com as the handle for the LinkedClaims ATProto account, set this DNS TXT record:

_atproto.linkedclaims.com. IN TXT "did=did:plc:xztctnvt5ycnsippd3orwqk7"