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DocVerify Chain

One API. One QR code. Zero fraud — tamper-proof document verification on blockchain.

100%tamper detection — QR-verified in under 2 seconds
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DocVerify Chain — Stark Digital
The problem

India lost ₹22,845 crore to cyber fraud in 2024 — a 206% year-over-year surge — while forged NOCs, fake certificates and tampered land deeds clog courts for decades. Manual verification is structurally broken: 90% of bank frauds are detected only in previous fiscal years.

What it does

Capabilities.

01

Register via one API

Government apps upload a PDF through a single API call. DocVerify generates a SHA-256 hash in-memory and the PDF is immediately deleted — zero storage.

02

Immutable blockchain record

The hash plus metadata is stored permanently on the Polygon blockchain and cannot be altered, deleted or forged by anyone.

03

Public QR verification

Any citizen scans the QR code with any phone and gets an instant result — VALID, EXPIRED, REVOKED or NOT FOUND — in English or a regional language, with no app needed.

04

Instant tamper detection

Changing even one pixel in the original PDF produces a completely different SHA-256 hash, making any tampering instantly detectable.

05

Dual deployment

Run on public Polygon for fastest rollout and cross-state verification, or on the sovereign NIC Vishvasya with zero gas fees — same platform, same API, switch via configuration.

06

Hardened API gateway

Node.js + Express gateway with JWT auth, SHA-256-hashed API keys, per-app rate limits, IP whitelisting and strict CORS.

How it works

The process.

01Upload PDFDepartment app sends a PDF via one API call. SHA-256 hash generated in-memory; PDF immediately deleted — zero storage.
02Blockchain recordHash + metadata stored on Polygon. QR code generated with a unique verification URL. Immutable forever.
03Citizen verifiesAnyone scans the QR on any smartphone for an instant status — VALID / EXPIRED / REVOKED / NOT FOUND. Bilingual.
Proof

By the numbers.

0.3

₹ per document — 1000x cheaper than Ethereum mainnet

2s

p95 public QR verification, any device, any network

10000+

documents per day on just 2 servers

34 Cr+

documents already verified on India's National Blockchain Framework

Where it applies

Use cases

Property Tax / NOC verificationBirth & death certificatesLand records & sale deedsAny government certificate or credential
Why us

What sets it apart

  • Aligned to MeitY's National Blockchain Framework & Vishvasya Stack
  • Zero PDF storage — in-memory processing only
  • Public Polygon or sovereign NIC deployment
  • Pilot live in 3 days
Security & compliance

Built for trust.

BSA 2023 — SHA-256 hashes admissible as court evidence
DPDP Act 2023 (hash-only storage)
7-year immutable audit trail
RBAC + no self-registration
NIC Vishvasya ready
Integrations
NIC VishvasyaPolygonDigiLockere-Sign
Deployment
On-premNIC / MeitY cloudPublic Polygon
Recognition

Aligned to MeitY's National Blockchain Framework

Request a demo

Let's scope your next platform.

No obligation. A senior engineer reviews your requirement and maps it to a concrete, costed delivery plan.

Book a Consultationsales@starkdigital.net