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Sample contract

Logo design contract.
2 signatures. 16 minutes.

$4,200 logo deal. Designer + client both signed cryptographically. Anyone can verify either signature without our database.

CompletedCONTRACT Body locked$2.00 protocol fee

Logo design — Acme Inc × @colt

Created by @colt · sent April 28, 2026 14:16 UTC
LOGO DESIGN AGREEMENT

This agreement, dated April 28, 2026, is between Acme Inc.
("Client") and @colt ("Designer").

1. SCOPE OF WORK
   Designer will produce 3 initial logo concepts and 2 rounds
   of revisions on the chosen direction. Final deliverable is
   a vector logo file in SVG, PNG (transparent), and PDF formats.

2. FEE
   Total fee: $4,200 USD. Settled via Hylaq Rail when this
   contract is fully executed by both parties.

3. TIMELINE
   Initial concepts: 7 calendar days from contract execution.
   Revisions: 3 days each round.
   Final delivery: within 21 calendar days total.

4. OWNERSHIP
   Upon full payment, Client receives full ownership of the
   chosen logo. Designer retains the right to display the work
   in their portfolio.

5. CANCELLATION
   Either party may cancel before initial concepts are
   delivered, with a 25% kill fee due to Designer.

By signing below, both parties agree to these terms in full.
Body SHA-256 (locked at send)
7b4f9e2c1d8a5f3e6b0c9d4a7e2f1b8c5d0e3a6f9b2c5d8e1a4f7c0b3e6d9a2f
Body integrity verified — sha256(body) matches stored hash

Signatures (2 of 2)

  • @colt
    Signer #1 (Designer)
    ✓ SIGNED
    4/28/2026, 2:32:18 PM
    method: STUB
    Signature digest
    a1f3e7c9b2d5a8f0e4c6b9d2a5e8f1c4b7d0a3e6f9c2b5d8e1a4f7b0c3e6d9a2
    Digest valid — sha256(canonical(header) || bodyHash) matches
  • @acme-inc
    Signer #2 (Client)
    ✓ SIGNED
    4/28/2026, 2:48:42 PM
    method: STUB
    Signature digest
    b2e4f8d0c3a6b9e2c5d8f1a4b7e0c3f6a9b2c5d8e1f4a7b0c3d6e9a2c5d8f1b4
    Digest valid — sha256(canonical(header) || bodyHash) matches
Verify independently

Anyone can prove this contract was signed.

Both signers' digests are sha256(canonical(header) || bodyHash). Anyone — recipient, court, regulator, journalist — can recompute either digest from the document body + signature header and confirm validity. No need to trust our database. No vendor lock-in.

GET /api/sign/verify/01h94mz5a8b2t9p4kfvxnwd8jr
{ "title": "Logo design — Acme × @colt",
"status": "COMPLETED",
"bodyIntegrityVerified": true,
"signatures": [
{ "@colt", digestVerified: true },
{ "@acme-inc", digestVerified: true }
]
}
The 16 minutes, step by step
  1. Colt drafts the contract at /sign/new — title, body, kind=CONTRACT, adds @acme-inc as signer.
  2. Hits “Create + send”. The protocol locks the body SHA-256, charges the $2 fee via Hylaq Rail, sends the contract URL to @acme-inc.
  3. Colt visits /sign/<slug>, signs with his @colt key. The protocol computes sha256(canonical(header) || bodyHash) and stores it.
  4. @acme-inc receives the URL, reviews the body, signs with their key. Same digest computation.
  5. On the second signature, the document auto-flips to COMPLETED. Both parties can download the signed export, verify any signature, send to a court if needed.
  6. Total time: 16 minutes. Total cost: $2. Total trust required in Hylaq: zero — anyone can verify the digests forever.

DocuSign would have charged at minimum $10 (their starter tier monthly), held the document in their portal forever, and given you a signature that's an image of your name + an audit log they can revoke. We're a different sport entirely.

Cryptographically signed. Forever verifiable. Vendor-free.

This sample is hardcoded. The live product at /sign/<slug> renders from real Postgres + the digest engine.

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