Identity, Reputation & Capability

Credential Ledger

Cryptographic repository of Verifiable Credentials tracking agent certifications and reliability for machine-readable reputation.

A cryptographic repository issues and stores Verifiable Credentials (VCs) — tamper-evident attestations covering an agent's performance history, certifications, and reliability. Because VCs are cryptographically signed, any counterparty agent can verify the credential without contacting the original issuer, making trust mathematical rather than reputational.

Three Pillars

Why This Becomes Necessary

In autonomous markets where agents transact at machine speed, trust cannot depend on human vouching; cryptographically signed credentials allow buyer agents to assess a seller's track record instantly.

What a Solution Must Provide

Standards-compliant VC issuance, append-only ledger storage, holder custody for agents, verifier presentation flows, and revocation mechanisms that propagate without requiring the issuer to be online.

Regulatory & Standards Angle

eIDAS 2.0 establishes a legal framework for Verifiable Credentials and digital wallets; credential ledgers that implement the W3C VC standard align directly with eIDAS 2.0 interoperability requirements.

Related Primitives

Parent Hub

identityregistry.org

Foundational identity and trust registry for AI agents

capabilitydirectory.com

Directory of declared capabilities for autonomous agents

reputationledger.com

Ledger-backed reputation records for autonomous actors

capabilityregistry.org

Institutional registry standards for agent capabilities

Relevant: eIDAS 2.0 - eIDAS 2.0 creates the EU Digital Identity Wallet framework and mandates interoperable Verifiable Credentials for cross-border digital identity, directly applicable to agent credential ledgers. Source

Research: Virtual Agent Economies — Tomasev, Franklin, Leibo, Jacobs, Cunningham, Gabriel, Osindero

“One way that reputation could be made concrete and machine-readable is through the use of Verifiable Credentials (VCs), as the digital equivalent of physical credentials like licenses or certificates... VCs are cryptographically signed attestations provided by an issuer in relation to a subject, that are designed to be tamper-evident.”

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