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Rootstock
Rootstock is a Bitcoin sidechain and EVM-compatible smart-contract network focused on Bitcoin DeFi. It enables developers, users, and institutions to build and use decentralized applications secured through Bitcoin merge mining, with rBTC as its Bitcoin-pegged native asset.
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Union
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Description
Union is a bridge between Bitcoin and Rootstock that uses BitVMX, light-client validation, and independently bonded functionaries to verify cross-chain transfers. It follows a 1-of-n honest assumption and requires valid proofs before BTC can be unlocked, with a modular design intended to support future multi-network interoperability.Category: Bridge
PowPeg
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Description
PowPeg locks BTC on the Bitcoin blockchain and issues corresponding rBTC on Rootstock for DeFi use; burning rBTC releases the corresponding BTC. Its security model combines Bitcoin proof-of-work authorization, Ledger hardware security modules, protocol-enforced signing rules, public monitoring, and independently operated signers.Category: Bridge