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  • OwnerAna María Cardona Casas
  • CertificationDiplomado en Marketing Digital
  • Issued byZERTI Demos
  • Issue dateJuly 25, 2026
  • Codeonnpi3c5a40h
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The authenticity of this certificate has been verified by ZERTI.

Verified on blockchain Altered
  1. Certificate issued ZERTI computed a mathematical fingerprint (SHA-256) of the certificate. No personal data ever leaves our servers: only that fingerprint goes to the chain.
  2. Stamped with OpenTimestamps The fingerprint was recorded via OpenTimestamps, the same open, free method used by universities such as MIT.
  3. Anchored on the blockchain The fingerprint was permanently recorded on the blockchain on August 6, 2026, in block #961.256. You can check it yourself.
Blockchain block
#961.256
Fingerprint (SHA-256)
87a80a0e…3d1a
Network
Blockchain · OpenTimestamps
View the block on the blockchain Download technical receipt (.ots)

Proof of existence: this certificate, in its exact form, already existed on the sealing date. If anyone alters it, the fingerprint no longer matches and this check detects it. The record is public and does not depend on ZERTI.

Verifiable credential (Open Badge 3.0) Verified

This certificate is also a digital credential signed under the open Open Badges 3.0 standard. Anyone can check its authenticity independently, without relying on ZERTI.

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To validate it in the official verifier, copy this credential address and paste it into the "Uri to Resource" field:

https://zerti.co/demos/credencial/onnpi3c5a40h.json

The credential is signed with the issuer's key, published at zerti.co. No personal data travels in the clear: the recipient is identified by a hash.