# Marco Marinelli, Horizen Labs: The Missing Piece of the ZK Puzzle | ETHSofia

- Channel: [ETHSofia](https://streameth.org/ethsofia)
- Date: 2025-10-07
- Duration: 12:59
- Topics: Horizen Labs, Marco Marinelli, ZK, ETHSofia, Zero-Knowledge, Zero Knowledge
- Watch: https://streameth.org/watch/yt-4bva68BJ4nw
- YouTube: https://www.youtube.com/watch?v=4bva68BJ4nw

## Description

Marco currently contributes to zkVerify, a modular zero-knowledge proof verification chain aimed at democratizing the adoption of ZK proofs. zkVerify supports a wide range of proof schemes and reduces verification costs by more than 90% compared to native EVM verification. Marco's technical background and multi-year experience in the space enable him to drive the adoption and understanding of ZK tech and its broader implications on privacy, scalability, and beyond.

Chapters:
00:00 Intro
00:50 ZK Technology Explained
01:33 Where's Waldo Example
02:13 Simplifying ZK Proofs
02:56 Prover and Verifier Roles
03:38 ZK Rollups Use Case
04:26 Scalability with ZK Proofs
05:04 Lifecycle of ZK Proofs
05:41 Modularity in ZK Proofs
06:18 Why Modularize Proof Verification
06:53 Costs of Onchain Verification
07:41 Financial Impact of ZK Verification
08:26 Introducing zkVerify
09:09 How zkVerify Works
09:50 Architectural Diagram of zkVerify
10:41 Benefits of zkVerify
11:24 Incentivized Testnet Launch
12:09 Q&A - Trust Assumptions in zkVerify

This video was recorded during the ETHSofia Conference and Hackathon - October 17-19, 2024.

ETHSofia is THE crypto tech conference in Sofia, Bulgaria, bringing together enthusiasts, developers, researchers, and academia focused on Ethereum and other L1 chains. The conference is supported by the Ethereum Foundation and made possible by the generous contributions of industry leaders. For more information, please visit: https://www.ethsofia.com/

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