zkSYS Genesis Public Testnet Is Live: The Future of Bitcoin-Powered Smart Contracts Starts Now

We've been heads-down building for a long time. Today, we're ready to show you what we've been working on.

The zkSYS Genesis public testnet is officially live, and it's open for everyone to explore, test, and build on.

If you've been following Syscoin, you've probably heard terms like "Gateway," "zkSYS Genesis," "Edgechain," or "dual chain" floating around. We know it can sound complex. This post is here to break it all down in plain language, explain why it matters, and most importantly, why you should be excited.

The Big Picture: What Are We Actually Building?

Here's the simplest way to think about it:

We're building the trust and settlement infrastructure for a new generation of modular chains, all anchored to Bitcoin.

That's it. That's the mission.

Syscoin isn't trying to be the chain where every app lives. It's something more fundamental: the root of trust that makes an entire ecosystem of purpose-built chains possible. To do that properly, you need more than one layer. You need a system where each part does exactly what it was designed for. That's where our modular architecture comes in.

Two Chains, One Mission

Think of it like a power grid. You have the power plant (the source of energy: massive, hardened, built to never go down) and the electrical grid (the distribution network that delivers power to every home and business). You wouldn't run a factory inside the power plant, and you wouldn't build a power plant on every street corner.

That's exactly how Gateway and zkSYS Genesis work together.

Gateway: The Foundation

Gateway is the settlement layer, the bedrock. It's where final truth lives. When transactions happen on zkSYS Genesis, they eventually get proven and recorded on Gateway. Because Gateway is merge-mined with Bitcoin (using roughly 60% of Bitcoin's hashrate), it inherits the strongest security model in all of crypto.

Think of Gateway as the power plant, the hardened source of trust that keeps everything running.

zkSYS Genesis: The First Edgechain

zkSYS Genesis is a ZK rollup, a high-throughput execution layer that settles directly on Gateway. It bundles hundreds of transactions together, generates a mathematical proof that they're all valid, and sends that proof back to Gateway for final settlement.

zkSYS Genesis is the first Edgechain, the one that proves this entire modular architecture works. Future Edgechains like Prime (DeFi, gaming, consumer apps) and Lunos (compliance, enterprise) will each connect to Gateway the same way zkSYS Genesis does, independently and on equal footing.

Think of zkSYS Genesis as the proof of concept that opened the door for everything that comes next.

"Wait, What's a ZK Rollup?" Let's Break It Down

Imagine a shipping company that needs to get 1,000 packages through customs.

The old way (Traditional blockchain): Every single package goes through inspection individually. The customs officer opens it, checks it, stamps it, moves to the next one. It's thorough, but the line stretches for miles.

The ZK Rollup way: A certified inspector at the warehouse verifies all 1,000 packages before they ship. They seal the entire container with a tamper-proof, cryptographic stamp that proves: "Every item in here has been checked and is exactly what it claims to be." Customs sees the stamp, verifies it in seconds, and waves the whole container through. If anything had been tampered with, the stamp wouldn't match, it's mathematically impossible to fake.

That's what zkSYS Genesis does. It processes transactions in batches, generates a cryptographic zero-knowledge proof that guarantees every transaction is valid, and submits that proof to Gateway. No trust required, the math speaks for itself.

Why Two Chains Instead of One?

This is the question everyone asks. Here's why:

Because great architecture means each layer does exactly what it was designed for.

Syscoin L1 is intentionally hardened and minimal, its job is to be the most reliable settlement base possible, anchored to Bitcoin. Gateway extends that as the settlement layer for the execution fabric above it. And zkSYS Genesis is the high-throughput execution environment where computation actually scales.

This isn't a workaround. It's a deliberate design, the same principle behind every robust system, from the internet's protocol layers to how modern processors separate memory, compute, and I/O.

What Makes This Different from Other L2s?

There are dozens of Layer 2 solutions out there. Here's what makes zkSYS Genesis stand apart:

1. Secured by Bitcoin, Not Just Ethereum

Most ZK rollups settle on Ethereum. zkSYS Genesis settles on Gateway, which is merge-mined with Bitcoin. That means the security of your transactions is backed by the most battle-tested, decentralized network in existence.

2. Built on ZK Stack (by Matter Labs)

zkSYS Genesis isn't a custom, untested rollup framework. It's built on ZK Stack, the same technology behind zkSync, one of the most trusted ZK rollup systems in the industry. Production-grade. Battle-tested.

3. Edgechain Architecture: Purpose-Built Chains on a Shared Trust Layer

zkSYS Genesis is the first Edgechain, and it proves the model works. Edgechains are purpose-built, independent execution environments that each settle directly on Gateway. They inherit Syscoin's trust guarantees while running their own logic, economics, and vertical focus. Prime will serve DeFi and consumer applications. Lunos targets compliance and enterprise. And anyone can launch their own Edgechain for their specific use case, all as peers, all secured by Bitcoin.

The Full Stack: From Bitcoin to Your App

Here's the complete picture of how everything connects:

Here's what happens when a transaction flows through this stack:

1. You submit a transaction on an Edgechain: zkSYS Genesis, Prime, Lunos, or any future chain
2. That Edgechain bundles transactions and generates a ZK proof independently
3. The proof is submitted directly to Gateway, which verifies it and records the final state
4. Syscoin L1 anchors everything to Bitcoin via merge-mining

Every Edgechain is a peer. None depends on another. They each connect directly to Gateway and inherit the same Bitcoin-grade trust.

What Can You Do on the Testnet Right Now?

The public testnet is live and ready for you to explore. Here's how to get started:

For Users

For Developers

Add zkSYS Genesis to Your Wallet

1. Open MetaMask (or your preferred wallet)
2. Click "Add Network"
3. Enter the following details:
   • Network Name: zkSYS Genesis Testnet
   • RPC URL: https://rpc-zk.tanenbaum.io
   • Chain ID: 57057
   • Currency Symbol: SYS
   • Block Explorer: https://explorer-zk.tanenbaum.io
4. Save, and you're connected!

Why Has This Taken So Long?

We get this question a lot. Here's the truth:

Building a ZK rollup that settles on a Bitcoin-secured chain is not easy. There's no template for this. We're not forking an existing L2 and slapping a new name on it, we're building something genuinely new.

Here's what went into this:

• Custom ZK Stack integration with Syscoin's unique architecture
• Prover infrastructure: the servers that generate ZK proofs are complex and resource-intensive
• Bridge security: trustless bridges between chains must be bulletproof
• Extensive testing: we've run hundreds of thousands of transactions in stress tests to ensure reliability
• Partnership with Zeeve: world-class RaaS (Rollup-as-a-Service) infrastructure

We could have shipped something half-baked months ago. We chose not to. What you're seeing today is a system that works.

What Comes Next?

This testnet is just the beginning. Here's the roadmap:

• Now: Public testnet: try it, break it, give us feedback
• Q3 2026: Ecosystem onboarding: DApps, DeFi protocols, developer tooling
• TBD: Mainnet launch: real value, real transactions
• TBD: Edgechain standard: any project can launch their own chain on Syscoin

The Vision: A Modular Execution Fabric, Anchored to Bitcoin

Here's the full picture of where this architecture is heading:

Every Edgechain: zkSYS Genesis, Prime, Lunos, and whatever comes next is an independent, purpose-built execution environment that settles directly on Gateway.

They each have their own logic, economics, and vertical focus. But they all share one thing: every transaction, every state change, every proof flows down through Gateway and Syscoin L1, ultimately anchored to Bitcoin.

This isn't just another L2 launch. This is the trust infrastructure for a new generation of Bitcoin-secured chains.

Join Us

The testnet is live. The doors are open.

For Developers

Deploy your contracts, stress-test the execution environment, and see what Bitcoin-secured ZK rollups feel like firsthand.

• Get test tokens: faucet-zk.tanenbaum.io
• Bridge assets: bridge-zk.tanenbaum.io
• Explore transactions: explorer-zk.tanenbaum.io

For Infrastructure Teams & Partners

Interested in launching your own Edgechain? Looking to integrate your protocol, tooling, or infrastructure with Syscoin's modular stack? We want to hear from you.

• Reach out: @syscoin on X
• Email: [email protected]

Whether you're building a DeFi-focused chain, an enterprise compliance layer, a gaming runtime, or something we haven't imagined yet — Syscoin's trust layer is ready for you.

Stay Connected

• Follow us: @syscoin on X
• Join the community: Discord | Telegram

We built this for you. Now go test it.

The future of Bitcoin isn't just holding. It's the trust layer for everything we build next. And it starts here.

About Syscoin

Syscoin is the Bitcoin-aligned trust, settlement, and finality anchor for a modular execution fabric. Its Layer 1 is merge-mined with Bitcoin, providing unmatched security and data availability. Through Gateway, Syscoin powers a growing network of purpose-built Edgechains, starting with zkSYS Genesis, each inheriting Bitcoin's trust guarantees while serving their own markets and use cases.

Learn more at syscoin.org.