Skip to Content
Getting StartedWhat is Digital Trust Foundry?

What is Digital Trust Foundry?

Digital Trust Foundry is a platform for building applications that produce digitally signed, independently verifiable content. Organizations use it to create, sign and verify digital artifacts, from purchase orders and invoices to compliance attestations and audit records.

Every artifact created through Foundry carries cryptographic proof of who signed it, when it was signed, and whether the signer had the organizational authority to do so.

Core Concepts

Trustables

A Trustable is any piece of digital content that has been wrapped with verifiable trust metadata. When you create a Trustable, it is signed by the assigned signer using KERI-based cryptographic identifiers. The result is a self-contained artifact that anyone can verify independently.

Enterprise Identity

Foundry manages a hierarchy of signing authority within your organization. An enterprise identity is established in your tenant, and authority is delegated to individual officers through a verifiable chain. Each delegation is recorded as a KERI event, creating an auditable trail from the organization to every signer.

vLEI Integration

A verifiable Legal Entity Identifier (vLEI) is a credential, defined by GLEIF, that binds an organization’s digital identity to its legal entity. With it, external parties can verify not just that “someone signed this” but that “an authorized officer of this specific legal entity signed this.” In Foundry you register your enterprise with its LEI, which is checked against GLEIF’s public records, and you can request a vLEI credential for it from a vLEI test network.

Platform Architecture

Foundry is a multi-tenant platform. Each organization gets an isolated tenant within a regional instance.

Instance (e.g., US1)
└── Your Tenant
    ├── Enterprise Identity (organizational AID + vLEI)
    ├── Officers (delegated signing authority)
    ├── Trustables (signed digital content)
    ├── API Keys (programmatic access)
    └── Users (team members + permissions)

Key Services

  • Platform: The main application at {your-tenant}.digitaltrustfoundry.com. It manages Trustables, enterprise identity, credentials, users and API keys, and performs the cryptographic work behind them, such as issuing credentials, recording key events and verifying signatures. For users who sign with platform-held (custodial) keys, the platform holds those keys and signs on their behalf.
  • Foundry Wallet: Companion app that holds signing keys on the user’s own device. It is available as a browser extension and as an iOS app. When a signing request is assigned to a user who signs with Foundry Wallet (Edge signing), they review and approve it in the wallet, and their private keys never leave the device.

Built on KERI

Digital Trust Foundry is built on the KERI (Key Event Receipt Infrastructure) protocol. KERI provides the cryptographic foundation that makes Foundry’s trust model possible:

  • Autonomic Identifiers (AIDs): Self-certifying identifiers that don’t depend on any central authority
  • Key Event Logs (KEL): Append-only logs that record every key operation, enabling key rotation without losing identity continuity
  • ACDCs: Authentic Chained Data Containers, the credential format used for Trustables and identity credentials
  • SAIDs: Self-Addressing Identifiers that provide tamper-evident content addressing

You don’t need to understand KERI internals to use Foundry: the platform handles the protocol behind its APIs and UI. To go deeper, see the KERI Deep Dive section.

What Can You Build?

Foundry is designed for any application where digital content needs to be independently verifiable:

  • Supply chain documents: Signed purchase orders, invoices and shipping documents
  • Compliance attestations: Audit records and regulatory filings with provable authority
  • Financial instruments: Agreements and approvals signed by verified officers
  • System-to-system trust: Automated signing for machine-generated content using API keys

Next Steps

Getting StartedGetting Your Tenant
What is Digital Trust Foundry? | Digital Trust Foundry Docs