Advanced Digital Signature in Your Digital Credentials: Authenticity with Legal Backing

signature

In a world where verifying academic and professional achievements is increasingly critical, POK – Proof of Knowledge raises the standard by integrating advanced digital signatures into every issued credential. This feature allows a designated person to validate and approve each certification before publication, ensuring that no document leaves without maximum integrity, authenticity and legal backing.

Secure Pre-Approval

  • Each credential goes through a review and digital signature process by an authorized user before publication.
  • Errors in names, programs or dates that could affect institutional credibility are prevented.
  • Ideal for institutions requiring strict quality control before any issuance.

Quote – Academic Director, University in Chile
"Before, every time there was an error in a diploma, we lost time, money and trust. With POK, the prior digital signature gives us peace of mind that every document is 100% correct before going public."


Institutional Trust with Blockchain Support


  • Each digital signature is linked to the NFT credential on the blockchain, creating an immutable and verifiable record.
  • Credentials cannot be modified or forged, even if shared outside the platform.
  • Companies, universities and organizations can verify authenticity in seconds, without intermediaries.

Quote – CTO of University Network in Brazil
"When an employer receives a digitally signed credential in POK, they know it’s real. They don’t need to call or email to verify: the blockchain confirms it instantly."


Enhanced Reputation


  • Each signed credential reflects your institution’s commitment to transparency and quality.
  • Strengthens image with students, graduates, companies and regulators.
  • Positions you as a differentiator compared to institutions still using easily forged PDF certificates.

Quote – President of a Private University in Mexico
"Our students feel proud to receive a certificate that is not only digital and modern but also bears the official signature of our institution backed by blockchain."

Concrete Benefits

  • Maximum security: Credentials and microcredentials impossible to forge or alter.
  • Time savings: Digital approval eliminates physical paperwork and streamlines processes.
  • Brand value: Positions your institution as innovative and trustworthy.

Conclusion

POK is the leader in Latin America in digital credentials and is expanding strongly in the United States, Europe and Asia. Its technology combines advanced digital signature, public blockchain and NFT credentials, making each document unique, verifiable and with international legal backing.

Frequently asked questions

POK offers two credential issuance modalities that can be used independently or combined:

Free Web2 version:
  • 100% free with no user caps, no setup costs, and no expiration
  • Credentials are verified via a unique link or QR code on the POK verification portal
  • Fully customizable design with institution branding
  • Compatible with Open Badges 3.0, W3C Verifiable Credentials, and ELM
NFT on public blockchain:
  • Each credential is registered as a unique Non-Fungible Token on Polygon and LacNet — public blockchains
  • Decentralized cryptographic verification — verifiable by anyone, independently, without POK as intermediary
  • Permanent traceability showing when and by whom the credential was issued
  • Recipient owns the credential in their digital wallet, shareable on professional networks
  • Credentials remain verifiable even if POK ceases to operate
Both versions are fully compatible. Institutions can issue Web2 credentials for free and upgrade specific credentials to NFT at any time without reissuing or losing history.

Open Badges 2.0 was the reference standard for digital credentials for years, allowing inclusion of basic metadata about the issuer, recipient, and achievement.

Open Badges 3.0, supported by POK, advances this significantly:
  • Integrates natively with the W3C Verifiable Credentials (VC) model — enabling cryptographic verification of credential authenticity
  • Improves interoperability with professional networks, LMS systems, and government platforms
  • Supports enriched metadata including competency framework alignments, detailed criteria, and supporting evidence
  • Compatible with the European Learning Model (ELM) for cross-border recognition
A credential issued under Open Badges 3.0 is not only richer in information — it has significantly greater integration capacity with current and future platforms, ensuring long-term validity and global portability. POK is 1EdTech certified for its Open Badges 3.0 implementation.

POK applies a comprehensive privacy-by-design approach across all platform layers:
  • Personal data is protected on encrypted servers and only shown if the user actively shares the credential
  • Complies with GDPR, Argentina's Law 25.326, Brazil's LGPD, and equivalent regional data protection regulations
  • Credentials are not forced to be public — control is always in the user's hands
  • Recipients can choose which credentials to display, share each credential with a unique link, and revoke access at any time
  • POK does not sell, rent, or share issuer or recipient information with third parties for commercial purposes
For institutions requiring formal compliance documentation, POK offers Data Processing Agreements (DPAs) and full audit support.
See more frequently asked questions

Start recognizing achievements with POK!