**Speaker**: Shumo Chu, [NEBRA](www.nebra.one) **Abstract**: How many proofs has been verified on Ethereum? How much gas fees has been spend to verifying the proofs? Where this proof is generated and how expensive to generate these proofs? In this talk, I will give an quantitative overview of zero-knowledge proof supply chain on Ethereum and discuss how would the incoming technological innovations can change the landscape. **Slides:** TBD **Video**: TBD