ProofLedger

Anchor documents to Bitcoin. Prove existence without revealing content.

ProofLedger lets you compute a SHA-256 hash of any document client-side, then anchor that hash permanently to the Bitcoin blockchain via Stacks. No file is ever uploaded. The proof lives on-chain forever.

Live: proofleger.vercel.app

What it does

• Anchor any document hash to Bitcoin via Stacks
• Verify a document existed at a specific block height
• Attest to documents anchored by others
• Mint soulbound NFT achievements for verified credentials
• Build an on-chain reputation score from your verified documents
• Share a public proof profile at /profile/[wallet]
• Export a decentralized CV at /cv/[wallet]

Tech Stack

• Next.js 16 (App Router)
• @stacks/connect v8 for wallet integration
• @stacks/transactions for contract calls
• Clarity smart contracts on Stacks mainnet
• Bitcoin-anchored finality

Contracts (Mainnet)

| Contract | Address | |---|---| | proofleger3 | SP1SY1E599GN04XRD2DQBKV7E62HYBJR2CT9S5QKK.proofleger3 | | credentials | SP1SY1E599GN04XRD2DQBKV7E62HYBJR2CT9S5QKK.credentials | | achievements | SP1SY1E599GN04XRD2DQBKV7E62HYBJR2CT9S5QKK.achievements |

UI Design - Neo-Brutalist

| Token | Value | |---|---| | Background | #0a0a0a | | Foreground | #f5f0e8 | | Accent | #F7931A (Bitcoin orange) | | Success | #00ff88 | | Error | #ff3333 | | Border | 3px solid with 6px 6px 0px hard shadows | | Heading font | Archivo Black | | Body font | Space Grotesk | | Mono font | Space Mono |

Local Development

git clone https://github.com/greyw0rks/proofleger.git
cd proofleger
npm install
npm run dev

Requires Hiro Wallet browser extension.

Project Structure

src/
  app/
    page.js                   # Main app (Anchor, Verify, My Records)
    profile/[wallet]/page.js  # Public proof profile
    cv/[wallet]/page.js       # Decentralized CV
  components/
    WalletButton.jsx          # Hiro wallet connect
    ErrorBoundary.jsx         # Runtime error handling
    SkeletonCard.jsx          # Loading skeletons
  lib/
    wallet.js                 # All blockchain interactions
  utils/
    formatters.js             # Display formatting helpers
    validators.js             # Input validation

Contributing

See CONTRIBUTING.md · SECURITY.md · ROADMAP.md