Make Contracts Irrefutable

Cryptographic proof of contract execution, amendments, and delivery. RFC 3161 timestamps accepted in federal court.

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The Legal Documentation Challenge

Digital evidence without proper authentication fails in court

"I never signed that" claims waste hours in litigation and often become expensive he-said-she-said battles.

When multiple versions of a contract exist, proving which version was actually agreed to becomes a complex challenge.

Did the other party actually receive the document? Without cryptographic proof, delivery disputes can undermine cases.

Screenshots and standard metadata are easily challenged in court. Digital evidence can be excluded without proper authentication.

Create immutable proof that a contract existed at a specific point in time.

Add an independent layer of proof to any e-signature platform.

Prove that documents were delivered and accessed.

POST/api/v1/contracts/register

Request

{
  "document_hash": "sha256:abc123...",
  "parties": ["party_a@example.com", "party_b@example.com"],
  "contract_type": "service_agreement"
}

Response

{
  "contract_id": "ctr_xyz789",
  "registered_at": "2025-12-24T10:30:00Z",
  "verification_url": "https://certnode.io/verify/ctr_xyz789"
}

CertNode creates a cryptographic hash of your document and timestamps it using RFC 3161 compliant authorities.

Add cryptographic proof to every contract, signature, and document delivery.

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