Trustless Proof of Attendance: Web3×BLE Protocol

A zero-knowledge oracle protocol that verifies real-world event participation through Bluetooth Low Energy proximity detection. By creating cryptographic proof of physical presence without centralized authorities, we enable objective, tamper-resistant attendance verification for the Web3 ecosystem.

Why this Protocol?

Bridging real-world experiences with blockchain verification through proven technology

Trustless Verification

Cryptographic proof of physical presence without depending on centralized authorities or event organizers.

BLE Proximity Detection

Leverages proven Bluetooth Low Energy technology inspired by COVID contact tracing for reliable proximity detection.

Zero-Knowledge Privacy

Prove attendance while protecting personal data through advanced zero-knowledge proof techniques.

Blockchain Anchoring

Tamper-resistant storage and verification through public blockchain infrastructure.

Open Source Public Good

Foundational infrastructure for the Web3 ecosystem, released under permissive open-source licenses.

Modular Oracle System

Extensible architecture supporting diverse real-world data verification beyond just attendance.

Proof of Attendance Oracle

Proof of Attendance Oracle

Revolutionizing event participation verification through trustless technology

  • Participants’ devices automatically detect proximity with other attendees using Bluetooth Low Energy, creating cryptographic proof of physical presence
  • Smart contracts anchor interaction data to the blockchain, ensuring tamper-resistant verification without centralized authorities
  • Generate W3C standard Verifiable Credentials from proven attendance, giving users full control over their participation records
  • Addresses critical limitations of current POAP/SBT systems where organizers can mint tokens for non-attendees
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Protocol Vision

Protocol Vision

Building foundational infrastructure for Web3 real-world data verification

  • Modular oracle system supporting diverse real-world data types beyond attendance: skills, contributions, location-based experiences
  • Open-source public good enabling enhanced Sybil resistance and fairer DAO governance across the ecosystem
  • Privacy-preserving design with zero-knowledge proofs allowing selective disclosure of verified attributes
  • Foundation for next-generation reputation systems bridging physical and digital identities
Technical Documentation