EXPchain, developed by Polyhedra Network, focuses on bridging AI and blockchain with zero-knowledge proof technology for secure, privacy-preserving applications. 

Dart.club, mentioned in the collaboration, is a platform where users predict trends, verify results on-chain, and earn rewards, emphasizing "smoking darts" as a playful metaphor.

Chainlink VRF, referenced in related web results, provides on-chain verifiable randomness, a key feature likely used by Dart to ensure fair and unpredictable outcomes in its prediction system.

EXPchain's integration of zero-knowledge machine learning (zkML) supports ethical AI development, potentially enhancing Dart's ability to handle complex, transparent predictions.

The partnership aligns with Polyhedra's broader mission to foster trust in AI applications, targeting sectors like healthcare, finance, and smart cities.