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WBTC Blockchain Infrastructure Dynamics
BitGo announced on August 4 that it will replace LayerZero with Chainlink's Cross-Chain Interoperability Protocol (CCIP) as its exclusive cross-chain standard for encapsulating Bitcoin (WBTC).
WBTC currently has a market value of approximately US$7.4 billion, making it the largest encapsulated Bitcoin token with market value and the first such large asset to announce its transfer from LayerZero to Chainlink (LINK). BitGo also stated that CCIP will serve as the default cross-chain infrastructure for all future new assets.
WBTC is a tokenized asset that tracks the value of Bitcoin (BTC). Unlike native Bitcoin, it runs as an ERC-20 token and can be used in other blockchain decentralized financial applications for transactions, loans and mortgages. Since its launch in 2019 as the first product of its kind, WBTC has accounted for approximately 45% of the total market value of all encapsulated Bitcoin tokens and has maintained this leading position.
BitGo initially chose LayerZero in 2024 to extend WBTC to multi-chains. Its initial deployment used LayerZero on Avalanche and BNB Chain, and the configuration required BitGo's own validator to work with LayerZero or Polyhedra to approve each cross-chain transfer. This arrangement will now be completely replaced.
Migration wave triggered by KelpDAO vulnerability incident
The switch is part of a broader industry trend that stems from an attack on KelpDAO's LayerZero-based rsETH cross-chain bridge earlier this year that cost $292 million. The bridge uses a one-to-one validator configuration, which means that only a single decentralized verification network operated by LayerZero Labs has the authority to approve cross-chain messages. The attacker hacked into the off-chain infrastructure that provided data to the single validator, falsifying approval messages, resulting in the theft of $292 million. This attack exposed structural vulnerabilities in LayerZero's configurable security model under specific usage methods.
Based on Dune Analytics data, a subsequent review of the LayerZero ecosystem found that 47% of LayerZero OApp contracts use the same one-to-one configuration. This discovery heightened concerns for projects using LayerZero and accelerated migration plans across the industry. LayerZero subsequently updated the system to prevent single validator settings, but the reputational damage caused by KelpDAO events continued to drive projects away. [TAG
Prior to BitGo's August 4 announcement, projects that had migrated to Chainlink included Mantle, Kelp, Lombard, Solv Protocol, Virtuals, Re, and Kraken. Among them, Kraken's kBTC itself is also an encapsulated bitcoin token, so WBTC's announcement continues the existing trend of encapsulated bitcoin market. The total assets involved in these previous announcements were approximately $7.24 billion. Combined with WBTC's $7.4 billion, the cumulative total of assets that have been announced to migrate from LayerZero to Chainlink has increased to approximately $14.6 billion.
Advantages and reasons for choosing Chainlink CCIP
Chainlink said that each CCIP cross-chain bridge is protected by at least 16 independent node operators, all of which have undergone security reviews and have verifiable runtime and reliability records. This is in sharp contrast to the configurable and potentially minimalist validator settings allowed by LayerZero, which provides flexibility to the project but can also introduce risks if that flexibility is abused. Chainlink's CCIP is also the only cross-chain agreement to hold both SOC2 Type 2 and ISO 27001 compliance certifications, two standards typically required by institutional counterparties when assessing infrastructure risks.
BitGo CEO Mike Belshe said in a statement that security has always been the core of the company's operations. "Chainlink CCIP provides us with a proven and widely adopted interoperability standard that meets the level of control, reliability and risk management customers expect BitGo to provide." Belshe said. The company pointed out that CCIP's built-in rate limits and configurable transfer control functions are designed to act as automatic circuit breakers, minimizing the impact of potential events before they spread across chains.
The structure of this migration also retains BitGo's control of its token contracts. Under Chainlink's arrangement, BitGo has full ownership of the WBTC contract and can set its own cross-chain transfer limits and access control parameters. Chainlink's registry has shown that the WBTC pool supported by CCIP is active on Ethereum and Ronin. BitGo did not specify a specific date for completing the migration across all support chains.
WBTC was launched in 2019. At its peak, its circulation market value exceeded US$15 billion and once occupied the entire encapsulated bitcoin market. In recent months, even though the price of Bitcoin has fallen since September 2025, its total supply has remained relatively stable. WBTC's market share has declined as competitors such as Coinbase's cbBTC enter the space, but with a market value of US$7.4 billion, it remains the dominant asset position in the category with a significant advantage.
