CertChain: A Scalable, Privacy-Preserving Blockchain Framework for Tamper-Proof Academic Credential Verification. International Research Journal on Advanced Engineering Hub (IRJAEH), [S. l.], v. 4, n. 03, p. 1074–1078, 2026. DOI: 10.47392/IRJAEH.2026.0151. Disponível em: https://irjaeh.com/index.php/journal/article/view/1393.. Acesso em: 6 may. 2026.