07 / 07 · Cloud Nine Solutions · 2023 — 2024

Verifying certificates with OCR and a public ledger

CV/AI · Full-stackShippedPython · EasyOCR · Django · MySQL · Hedera Hashgraph

01Problem

[Problem]

[Design and tradeoffs]

[Image — certificate OCR]

Fig. 1 — [Caption]

[Screenshot — Django web app]

Fig. 2 — [Caption]

[Chart or table]

Fig. 3 — [Caption]

Researched OCR and blockchain approaches for a certificate verification system assigned by company leadership, then delivered the proposal that was approved for development.
Built the OCR pipeline extracting structured data from food certification documents, fine-tuning EasyOCR for the certificate layouts in use.
Developed the Hedera Hashgraph validation module, anchoring document hashes on-ledger for tamper-evident verification of issuance and revocation.
Designed the certificate data model and verification flow, matching extracted fields against ledger records to catch altered or expired documents.

[What I learned]