Wrapped Bitcoin (wBTC)

What Is Wrapped Bitcoin (wBTC)?

Bitcoin is the most valuable and widely held cryptocurrency in the world. But the Bitcoin blockchain was not designed to interact with smart contracts or decentralized applications. This limitation created a problem for the growing DeFi ecosystem that needed Bitcoin's liquidity but could not natively access it.

Wrapped Bitcoin (wBTC) solves this problem. It is an ERC-20 token on the Ethereum blockchain that represents Bitcoin on a one-to-one basis. Every wBTC in circulation is backed by an equivalent amount of real Bitcoin held in reserve by a custodian. This allows Bitcoin holders to participate in Ethereum-based DeFi protocols, lending platforms, and decentralized exchanges without selling their Bitcoin.

Think of it as a tokenized version of Bitcoin that speaks Ethereum's language.

How Wrapped Bitcoin Works

The wrapping process involves three key participants:

• Merchants who initiate the minting and burning of wBTC on behalf of users
• Custodians who hold the underlying Bitcoin in reserve. BitGo is the primary custodian for wBTC
• The wBTC DAO a decentralized autonomous organization that governs the overall wBTC ecosystem and manages the list of approved merchants and custodians

The process works as follows:

Minting wBTC:

• A user sends Bitcoin to an approved merchant
• The merchant submits a minting request to the custodian
• The custodian verifies the Bitcoin deposit and mints an equivalent amount of wBTC on Ethereum
• The newly minted wBTC is sent to the user's Ethereum wallet

Burning wBTC:

• A user sends wBTC back to the merchant
• The merchant initiates a burn request, destroying the wBTC tokens
• The custodian releases the equivalent Bitcoin back to the user

Every mint and burn transaction is recorded on-chain, making the entire reserve process publicly verifiable at any time.

What Is wBTC Used For?

Once Bitcoin is wrapped, it can be used across the Ethereum ecosystem just like any other ERC-20 token:

• DeFi lending and borrowing on platforms like Aave and Compound, using wBTC as collateral to borrow other assets
• Decentralized trading on DEXs like Uniswap and Curve Finance, providing liquidity in Bitcoin-denominated trading pairs
• Yield farming by supplying wBTC to liquidity pools and earning protocol rewards
• Collateralization in stablecoin protocols that accept wBTC as backing for issued stablecoins
• Cross-protocol interactions within the broader Web3 ecosystem that requires ERC-20 compatibility

wBTC and Custody Risk

While wBTC makes Bitcoin more versatile, it introduces a fundamental trade-off: centralized custody. Unlike native Bitcoin held in a self-custodied wallet, wBTC relies on BitGo and approved merchants to hold the underlying reserves honestly and securely.

This creates risks that users need to understand:

• Custodian risk where a failure, hack, or insolvency of the custodian could put underlying Bitcoin reserves at risk
• Smart contract risk where vulnerabilities in the wBTC contract could be exploited
• Centralization risk where a small group of custodians and merchants control a significant portion of wrapped Bitcoin supply
• Regulatory risk where custodians holding Bitcoin reserves may face regulatory action affecting their ability to operate

Wrapped Bitcoin and Compliance Considerations

From a compliance standpoint, wBTC transactions carry the same AML obligations as any other crypto asset but with added layers of complexity.

Key compliance considerations include:

• Counterparty risk at the minting and burning stage, where merchants must apply KYC and AML checks on users initiating wrapping requests
• DeFi exposure where wBTC used in lending pools, liquidity protocols, or yield farming strategies may interact with wallets linked to high-risk entities
• Fund flow tracing across both the Bitcoin blockchain and the Ethereum network, requiring multi-chain analytics to build a complete picture
• Sanctions screening of wallet addresses involved in wBTC minting, burning, and transfers
• Source of funds assessments for large wBTC positions, tracing the origin of the underlying Bitcoin reserves

Regulators increasingly expect businesses handling wrapped assets to apply the same level of diligence as they would to any native cryptocurrency.

How Scorechain Supports wBTC Compliance

Monitoring wrapped assets like wBTC requires analytics capabilities that span both the Bitcoin and Ethereum blockchains simultaneously. Scorechain's blockchain analytics platform covers both networks and supports cross-chain fund flow tracing, wallet screening, and risk scoring across 21 plus blockchains and 10,000 plus crypto assets.

Whether you are screening a wBTC wallet for sanctions exposure, tracing funds that moved between Bitcoin and Ethereum through the wrapping process, or monitoring DeFi interactions involving wrapped assets, Scorechain provides the multi-chain intelligence needed to maintain compliance with confidence.

Visit scorechain.com to learn more about how Scorechain handles wrapped asset compliance, or book a demo to see the platform in action across Bitcoin and Ethereum simultaneously.