Block-Chain Based Certificate Verification System. International Journal of Engineering & Extended Technologies Research (IJEETR), [S. l.], v. 8, n. 2, p. 3706–3712, 2026. DOI: 10.15662/IJEETR.2026.0802375. Disponível em: https://ijeetr.com/index.php/ijeetr/article/view/802. Acesso em: 26 apr. 2026.