Open source

Cryptographic provenance for claims and creators.

Ed25519 signatures, RFC 3161 timestamps, and attestation chains — packaged as two CLI-first .NET libraries with 590 tests.

See the ledgers Read the Handbook

Claim

dotnet run --project ClaimLedger.Cli -- assert claim.json

Attest

dotnet run --project CreatorLedger.Cli -- attest asset.png

Test

dotnet test ledger-suite.sln # 590 tests

Why Ledger Suite

Portable, offline-first cryptographic proof.

Ed25519 signed

Every claim, citation, and attestation carries a cryptographic signature. No blockchain, no third party.

RFC 3161 timestamps

Non-repudiation via trusted timestamping authorities. Proves when a claim was made.

590 tests

ClaimLedger (371) + CreatorLedger (219). Runs on every push with Windows CI for DPAPI coverage.

The Ledgers

Two ledgers, one shared crypto layer.

Project

Purpose

Tests

ClaimLedger

Scientific claim provenance and verification

371

CreatorLedger

Creator attestation proofs for digital assets

219

Shared.Crypto

Ed25519 primitives shared across both ledgers

—

Quick start

Build & test

git clone https://github.com/mcp-tool-shop-org/ledger-suite.git
cd ledger-suite

dotnet build ledger-suite.sln
dotnet test ledger-suite.sln

ClaimLedger CLI

# Assert a claim with Ed25519 signature
dotnet run --project src/ClaimLedger/ClaimLedger.Cli -- assert claim.json

# Publish a ClaimPack bundle
dotnet run --project src/ClaimLedger/ClaimLedger.Cli -- publish

ClaimLedger

Scientific claim provenance.

Assertions

Sign claims with Ed25519 keys. Each assertion is a self-contained cryptographic proof.

Citations & attestations

Link claims together. Peer review, reproduction, and institutional approval — all signed.

ClaimPacks

Bundle claims, citations, and attestations into portable packages for offline verification.

CreatorLedger

Creator attestation proofs.

Content hashing

SHA-256 content hashes bind attestations to specific file versions.

Multi-party chains

Build attestation chains across multiple signers for collaborative provenance.

Proof bundles

Export portable proof bundles that verify without network access.