Overview
Blocktrust is a toolkit for digital identity on Cardano. It lets people prove things about themselves online (that they hold a certificate, passed a course, work for a company, or just control a particular account) without handing over a password or relying on a single platform to vouch for them1. The project bundles a browser-extension wallet, a secure messaging relay, a credential creation tool, and the software that anchors these identities on Cardano. All of it is built by a small team at codedata solutions in Münster, Germany.
The stack sits on top of Atala PRISM, the identity platform originally created by Input Output Group and contributed to the Linux Foundation as Hyperledger Identus in 202423. Blocktrust's niche is to ship ready-to-use products on top of this stack, so identity wallets and credential flows are accessible to projects that don't want to build the underlying plumbing from scratch.
Key Features
- Identity wallet that runs in your browser. A Chrome, Edge, and Brave extension lets a person create their own digital ID on Cardano, hold credentials in it, and sign in to supporting websites with a cryptographic key instead of a password4.
- A private post office for credentials. Blocktrust's open-source Mediator is a relay that shuttles credentials and encrypted messages between people's wallets, so two wallets can exchange information privately even if they're never online at the same time5.
- Independent node software for Cardano identities. OpenPrismNode is a community-run alternative to the reference node from Input Output Group. It reads and writes identity records on Cardano and exposes them through an API that other apps can plug into, so the network doesn't depend on a single operator6.
- Issue and verify credentials in a browser. A separate Credential Builder app lets organizations create credentials through a web form, and a small embeddable tool lets any website display credentials so visitors can verify them with a click1.
- No-code workflow designer in the works. An upcoming product lets organizations build credential issuance and checking workflows by wiring up steps visually, shipped as a Docker image they can self-host7.
What to Expect
Visitors to blocktrust.dev land on a product catalog rather than a single app. The homepage lists each product (identity wallet, analytics platform, mediator, credential badges, credential builder, workflow platform) with its own subsite and documentation. People curious about what digital identity on Cardano looks like in practice can install the browser wallet and explore hosted demos. Organizations evaluating the stack can read technical documentation at identitywallet.blocktrust.dev and try the project's public Cardano node6. Developers can browse the source on Björn Sandmann's GitHub, which also hosts the mediator and workflow platform repositories.
Community channels are small by design. The project runs a Discord server and a YouTube channel rather than a branded social presence, and the lead developer doubles as a registered Cardano governance representative, which reflects how closely the project is tied to the broader ecosystem. Several products are still described by the team as proof-of-concept moving toward production8. The honest read is that Blocktrust is a maturing, well-scoped open-source project rather than a finished consumer product.
