Legal Document Integrity

Contract Verification Built for Legal Teams

Instantly verify the authenticity of contracts, agreements, and legal deeds. SHA-256 cryptographic hashing detects any tampering — down to a single character.

Start free verification →How it works

Documents remain private and inaccessible to DocMind by design. Patent pending technology.

contract verificationdocument authenticitylegal document integritycontract fraud detectionnotary verificationdocument hashdeed verification
The Problem

Contract fraud costs businesses billions every year

Altered contracts are one of the most common forms of commercial fraud. A signed agreement is scanned, edited in a PDF editor, and re-submitted — the changes are invisible to the naked eye.

Traditional approaches like passwords, watermarks or e-signatures don't detect post-signing changes. They tell you who signed, not whether the document changed after signing.

  • Altered payment terms in procurement contracts
  • Modified liability clauses in real estate deeds
  • Falsified signatures on employment agreements
  • Backdated contracts in M&A transactions
The Solution

Cryptographic integrity — not just a signature

DocMind computes a SHA-256 hash of your contract at the moment of sealing. This fingerprint is unique to every byte of the document. Any change — even a single space — produces a completely different hash.

When a party submits a contract for review, they upload it to DocMind's verification tool. The system recomputes the hash and compares it to the sealed original in under a second.

Every verification attempt is logged with timestamp, IP address, and result — creating a legally relevant audit trail.

How DocMind works

1
Upload
Upload & seal the contract
Upload your signed contract. DocMind computes a SHA-256 hash and issues a unique structured seal code (e.g. NL-2026-CO-...).
2
Embed
Embed the verification seal
The seal code and a QR code are embedded into the document. Recipients can verify authenticity at any point in time.
3
Share
Send securely
Share the sealed document via DocMind's encrypted transfer, email, or your existing workflow. The seal travels with the document.
4
Verify
Verify instantly
Any party can upload the contract to docmind.nl/v and verify authenticity in seconds — no account required.

Key benefits

🔐
Tamper-evident
Any modification to the contract — even a single character — is detected immediately.
⏱️
RFC 3161 timestamp
Cryptographic proof of when the document existed, from an independent Trusted Timestamp Authority.
🔍
4-layer verification
Hash match, embedded QR, RFC timestamp, and metadata seal — four independent checks.
📋
Full audit trail
Every verification attempt is logged with timestamp, IP address, and outcome.
🌍
No account required
Counterparties can verify without creating an account — just visit /v and upload.
🏛️
Zero-knowledge design
DocMind never reads or stores the content of your contracts. Only the hash is retained.

DocMind vs. Traditional methods

Feature
DocMind
Traditional methods
Detects post-signing changes
Cryptographic hash (SHA-256)
RFC 3161 timestamp
Embeds verification QR in PDF
Full verification audit trail
No-account verification for counterparty
Zero-knowledge (content private)

Start verifying contracts today

Free for up to 3 documents. No credit card required. Trusted by law firms, notaries, and compliance teams.

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