Kraken is replacing LayerZero with Chainlink’s Cross-Chain Interoperability Protocol as the exclusive bridge for kBTC, its $260 million bitcoin-backed token, and all future wrapped assets the exchange issues. The switch, announced Thursday, covers Ink, Ethereum, Unichain, and Optimism in the first wave, with additional chains to follow. The decision lands four weeks after a $292 million exploit drained a Kelp DAO bridge built on LayerZero, an attack U.S. authorities linked to North Korea’s Lazarus Group.
The move puts Kraken in line with a broader migration. Chainlink CCIP has pulled in more than $2.5 billion in total value locked from protocols leaving LayerZero in recent weeks, including Kelp, Solv, Re, and Tydro.
Key Takeaways
- Kraken announced on May 14, 2026 that Chainlink CCIP will replace LayerZero as the sole cross-chain rail for kBTC and future wrapped assets.
- The migration follows a $292 million exploit of a LayerZero-powered Kelp DAO bridge in April, which LayerZero later admitted was tied to a “mistake” in verifier configuration.
- kBTC has a market cap of roughly $260 million and operates across Ethereum, OP Mainnet, Ink, and Unichain, with more chains planned.
- Total value locked migrating from LayerZero to Chainlink CCIP now exceeds $2.5 billion across multiple protocols.
Published: May 15, 2026 09:00 UTC
What changed for kBTC users
Kraken’s wrapped bitcoin is a 1:1 backed token that lets bitcoin holders use BTC value inside DeFi applications on other chains. A wrapped token is a digital asset that represents another asset on a different blockchain, backed one-to-one by reserves of the original.
Until this week, kBTC moved between chains using LayerZero’s messaging protocol. Under the new design, every kBTC transfer between Ink, Ethereum, Unichain, Optimism, and the chains Kraken adds next will route through Chainlink CCIP. Existing balances do not need user action. Kraken will handle the contract switch on its end, and any new mint or redeem instruction will use the Chainlink rail.
For traders and DeFi protocols holding kBTC, the change tightens the security model. CCIP uses Chainlink’s decentralized oracle network plus a separate Risk Management Network that can pause transfers if anomalies are detected. The Kelp exploit hit a LayerZero bridge that had been configured with a single-verifier setup, a structure LayerZero later acknowledged should not have been used to secure $292 million in assets.
The hack that triggered the migration
In late April, attackers drained 116,500 rsETH from Kelp DAO’s LayerZero-powered cross-chain bridge in what became the largest crypto exploit of 2026 so far. U.S. agencies attributed the operation to the Lazarus Group, a state-backed hacking unit tied to North Korea.
LayerZero initially blamed Kelp for the verifier setup. By May 9, the company reversed that position. In a public statement, LayerZero said it “made a mistake” by allowing its own verifier network to secure high-value assets in a configuration it now considers unsafe. Kelp had argued throughout that LayerZero approved the setup at launch, a claim LayerZero’s reversal partially validates.
The aftermath has been a steady outflow. Solv, Re, and Tydro all migrated wrapped-asset rails to Chainlink in the weeks following the hack. Kraken is the largest exchange to follow, and the announcement signals to other custodial issuers that LayerZero is no longer the default for institutional-grade wrapped assets.
What it means for cross-chain infrastructure
The Kraken decision narrows the field of viable cross-chain protocols for issuers handling regulated or institutional liquidity. LayerZero remains live across hundreds of integrations, but its position with custodial wrapped-asset issuers has weakened. Chainlink CCIP, which launched its mainnet general availability in 2024, now sits at the center of a $2.5 billion shift in TVL.
For developers, the practical signal is that audit posture and verifier design now matter as much as fee economics when picking a bridge. Single-verifier configurations are unlikely to attract new wrapped-asset deployments in the near term. Multi-verifier networks with independent risk management layers are becoming the standard request from custodians.
For traders, kBTC liquidity is unlikely to see disruption during the switch. Kraken has not published a hard cutover date but said additional chains will be added in coming weeks. Market makers active in kBTC pools across Optimism and Ethereum are expected to bridge through the new rail once it is live on each chain.
Frequently Asked Questions
What is kBTC and how does it work?
kBTC is Kraken’s wrapped bitcoin token, backed 1:1 by bitcoin held in reserve. It lets BTC holders use bitcoin value inside DeFi applications on Ethereum, Optimism, Ink, and Unichain. Each kBTC can be redeemed for one BTC at any time through Kraken.
Why is Kraken switching from LayerZero to Chainlink CCIP?
The change follows a $292 million exploit of a LayerZero-powered Kelp DAO bridge in April 2026. LayerZero later said the verifier configuration was a mistake. Kraken cited stronger security guarantees from Chainlink CCIP’s decentralized oracle network and separate Risk Management Network as the reason for the switch.
Do kBTC holders need to do anything?
No. Kraken is handling the contract migration on its side. Existing kBTC balances stay intact, and future cross-chain transfers will route through Chainlink CCIP automatically. New mints and redemptions will use the Chainlink rail going forward.
