Homebrew Tap for witnessd
Cryptographic authorship witnessing for writers and creators

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What is witnessd?

witnessd creates tamper-evident cryptographic records of document authorship. It provides irrefutable proof that you wrote what you wrote, when you wrote it.

• Prove authorship — Cryptographic evidence chain linking you to your work
• Detect AI content — Forensic analysis identifies non-human writing patterns
• Hardware-backed — Secure Enclave / TPM 2.0 integration for device binding
• Verify independently — Evidence can be verified by anyone, anywhere

Installation

# Add the tap
brew tap writerslogic/tap

# Install witnessd
brew install witnessd

Or install directly:

brew install writerslogic/tap/witnessd

Quick Start

# Initialize witnessd
witnessd init

# Calibrate VDF for your machine
witnessd calibrate

# Create checkpoints as you write
witnessd commit document.md -m "First draft"

# View history
witnessd log document.md

# Export evidence
witnessd export document.md --tier enhanced

# Verify evidence
witnessd verify evidence-packet.json

# Or verify online without installing:
# https://writerslogic.com/verify

Updating

# Update witnessd to the latest version
brew update
brew upgrade witnessd

Verification

All witnessd releases include:

• SHA256 checksums
• SLSA Level 3 provenance attestations
• SBOM (SPDX and CycloneDX)

Other Platforms

Platform	Installation
Windows	scoop bucket add writerslogic https://github.com/writerslogic/scoop-bucket && scoop install witnessd
From Source	See build instructions

Links

• witnessd Repository
• Documentation
• Report Issues
• Website

License

witnessd is licensed under the Apache License 2.0.