Code H4T8-R2WX-1NQD
Expiring soon
This certificate is genuine, but the qualification expires in 37 days.
Demo Demo: this is a fictional record, created to show how verification works. No real person or organisation is involved.
- Holder
- João C. F.
- Course
- NR-33 — Espaço Confinado, Trabalhador Autorizado
- Duration
- 16 hours
- Delivery
- In person
- Assessment
- with a graded assessment
- Completed on
- 5 December 2025
- Qualification valid until
- 5 December 2026
Issued by
Escola Técnica Horizonte
CNPJ **.***.***/0001-24
Issuer verification level: Legal entity verified
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The technical proof
- Record fingerprint (SHA-256)
96ae96505c5f474049febc9e5b85cfa7784ffb24f0df43fa3472a22bdb36779f- Registered and timestamped on
- 5 December 2025
The fingerprint above is computed over the record content. It joins that day's Merkle tree, whose root receives an independent timestamp — no personal data leaves the database, only the cryptographic digest.
What this does not prove
- It does not prove that the person showing the certificate is its holder.
- It does not prove the quality of the course, only that this issuer registered it.
- It does not replace a qualified electronic signature where the law requires one.