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What is Mezo?: A New Bitcoin L2 Economic Layer

Mezo is an emerging Bitcoin L2 that seeks to promote interoperability and user participation.
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By Tasmiha Khan for Trust Machines

Bitcoin's ecosystem is expanding, and the emergence of Bitcoin Layer-2 (L2) solutions is a testament to this growth. Among the new additions is Mezo, a Bitcoin L2 project developed by the venture studio Thesis. Recently, Thesis secured $21 million in funding to advance Mezo, which aims to make Bitcoin more usable in everyday transactions and integrate it further into the broader financial system.

Mezo stands out for its innovative approach to Bitcoin's scalability and utility. Unlike traditional L2 solutions, Mezo emphasizes user participation in network security through Bitcoin locking and introduces a unique consensus mechanism. This venture, led by Thesis and supported by notable investors like Pantera Capital and Multicoin Capital, promises to bring significant changes to how Bitcoin can be used beyond mere trading.

What is Mezo?

Mezo is a pioneering Bitcoin L2 solution designed to enhance Bitcoin's real-world usability. The project is rooted in the technology developed by Thesis, particularly leveraging tBTC, a decentralized Bitcoin bridging system. Mezo’s mission is to create a faster, cheaper, and more secure Bitcoin network that prioritizes miners and ensures robust user ownership of assets.

The initiative has attracted substantial investment from leading venture capital firms, underscoring its potential impact on the cryptocurrency landscape. Mezo's development is driven by a team with extensive experience in the Bitcoin ecosystem.

How Does Mezo Work?

To understand Mezo’s functionality, it’s essential to explore its core components and mechanisms:


tBTC is a critical component of Mezo, providing a reliable bridge for Bitcoin. It allows users to tokenize their Bitcoin for use on Ethereum, facilitating interoperability between the two blockchains.

This bridging system is essential for Mezo's goal of integrating Bitcoin into a broader range of financial applications. By enabling Bitcoin to be used in the Ethereum ecosystem, tBTC expands the utility of Bitcoin, allowing it to interact with decentralized finance (DeFi) protocols, smart contracts, and other blockchain-based applications. This interoperability is a key feature that differentiates Mezo from other Bitcoin L2 solutions.

Proof of HODL

Mezo introduces a novel consensus mechanism called Proof of HODL. This system rewards users for locking their Bitcoin in the network, thereby enhancing security and stability.

By participating in this mechanism, users can earn yield on their locked Bitcoin, incentivizing long-term commitment to the network. Proof of HODL not only secures the network but also aligns the interests of users with the health and security of the Mezo platform. This mechanism creates a community of engaged users who are incentivized to maintain the integrity and robustness of the network.

Locking in BTC and the HODL Score

Users can lock their Bitcoin in Mezo, which is then used to secure the network. The locked Bitcoin contributes to a user’s HODL score, a measure of their commitment and participation. The HODL score accumulates points based on the amount and duration of Bitcoin locked, with one Bitcoin equating to 1,000 points. This score plays a crucial role in the network's security and user rewards system. The higher the HODL score, the greater the rewards users can earn, creating a positive feedback loop that encourages users to lock more Bitcoin for longer periods.

The HODL score not only incentivizes user participation but also enhances network security by ensuring a significant amount of Bitcoin is locked and thus reducing the liquidity available for attacks. This unique approach to network security through user participation is a significant departure from traditional proof-of-work or proof-of-stake mechanisms and represents a novel way to leverage the community's commitment to Bitcoin.


Mezo represents a significant advancement in the Bitcoin L2 space, focusing on enhancing Bitcoin’s utility and scalability. While it’s currently in an invite-only phase, with select users able to deposit Bitcoin and build their HODL scores, the broader public will soon have access. The project’s anticipated launch on the mainnet in the latter half of 2024 promises to bring substantial value and functionality to Bitcoin, potentially transforming its role in the global financial system. Mezo is not just another L2 solution but a visionary step towards a more integrated and user-friendly Bitcoin ecosystem. Its innovative approach, supported by significant investment and a strong development team, positions it as a key player in the future of Bitcoin. The integration of tBTC for cross-chain interoperability, the unique Proof of HODL consensus mechanism, and the user-centric design highlight Mezo’s potential to redefine how Bitcoin is used in everyday transactions and larger financial contexts.

As the cryptocurrency landscape continues to evolve, projects like Mezo that focus on scalability, security, and real-world usability will be crucial in driving mainstream adoption. Mezo’s approach to leveraging user participation for network security and its commitment to integrating Bitcoin into the broader financial ecosystem make it a standout project in the growing field of Bitcoin L2 solutions.