POK Proof of Knowledge
Global platform for issuing verifiable digital credentials.
What it does
POK is a global platform for issuing verifiable digital credentials and microcredentials as NFTs on the blockchain — trusted by 1,100+ universities, governments, and companies across 19 countries. ISO 27001 and SOC 2 certified, 1EdTech certified, and compatible with Open Badges 3.0, W3C Verifiable Credentials, and the European Learning Model (ELM/Europass).
Does the same job
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- VAVekos – a Rust OS with Built-In Cryptographic Verification2024 · github.com · ▲82
VEKOS(Verified Experimental Kernel OS) is a Rust-based experimental kernel that focuses on runtime verification and security. Every filesystem operation and memory allocation generates cryptographic proofs that can be verified in real-time, ensuring system integrity. Think of it like a blockchain for OS operations rather than just storage verification. Key features: - Merkle tree-backed filesystem with operation verification - Memory manager with CoW and proof generation - Buddy allocator with zone-based memory management - Shell with VT100 support - Verified boot sequence with stage…

Certo – An open source platform to deliver Open BadgesAug 2026 · github.com · ▲17Certo is open-source infrastructure for issuing, managing, verifying, and exchanging digital credentials. It implements Open Badges 3.0[1] and W3C Verifiable Credentials[2] which are the open standards that make credentials portable, machine-verifiable, and vendor-independent. It is designed to be: - Self-hosted: run it inside your own infrastructure, air-gapped network, or sovereign cloud - Standards-compliant: credentials it issues work with any OB3/VC-compatible system - API-first: everything the UI can do, the API can do - Exportable: your data is always yours, in open formats -…
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