# Saakshya

Hackathon · 2026

> AI and blockchain document verification that returns one of four honest verdicts, from PROVEN to REJECTED, with a credential that verifies offline.

Built with Team Saakshya at the SISTec Innovation Hackathon 2026, for a problem statement on blockchain-based document verification. Upload a marksheet, a degree or a PAN card: Saakshya reads and audits it, checks the claim against the issuing authority’s register, anchors a salted hash in a Merkle-batched ledger and returns a signed credential with a QR code that verifies offline.

The point is the verdict. Instead of a yes or no, every document gets one of four levels: L3 PROVEN (issuer-signed or from DigiLocker), L2 CONFIRMED (matches the official register), L1 PLAUSIBLE (clean, but no register to check) and L0 REJECTED (evidence of tampering).

## Highlights

- OCR plus five families of forensic signals: error level analysis, noise residual, copy-move detection, metadata and PDF structure, and template consistency.
- Hash-chained ledger blocks with Merkle roots and RFC 9162-style inclusion proofs, using the same data model as the Hyperledger Fabric chaincode it would swap in for.
- On the ledger: salted leaf hash, Merkle root, verdict, model version and revocations. Off it, encrypted at rest: the document image, extracted personal data, salts and keys.
- A public verifier that checks the Ed25519 signature in the browser with WebCrypto and keeps working offline after the first load.

## Built with

FastAPI, RapidOCR, SvelteKit (Svelte 5), Tailwind CSS v4, GSAP, WebCrypto, Ed25519, Merkle ledger

## Links

- Live: https://saakshya.divyanshshukla.com
- Source: https://github.com/TheDivyanshShukla/saakshya
- Page: https://divyanshshukla.com/work/saakshya