This proposal builds a full-featured Atlas.Bitcoin integration layer, including:

1. Bitcoin Event MonitorUse Bitcoin Core, Electrum, or Esplora to watch BTC UTXOs. Track addresses, scripts, and transactions relevant to a dApp.

2. BTC-to-Plutus Trigger FrameworkLet developers define JSON/DSL-based BTC triggers. Automatically activate Plutus endpoints when BTC conditions are met.

3. BTC Proof Verification LayerSupport SPV/Babylon/BitVM proofs. Validate BTC transactions off-chain before submitting to Plutus.

4. Metadata and Asset TrackerLink BTC txids and asset metadata into Atlas storage. Enable off-chain visibility for BTC-backed Cardano tokens or NFTs.

5. Example BTC-aware dAppDemo app: trustless stablecoin minting, BTC-for-NFT auction, or BTC DAO contribution system.

Cardano currently lacks the tooling and infrastructure to support native Bitcoin integration. Developers seeking to build cross-chain dApps using BTC must rely on wrapped assets or custodial bridges, which compromise decentralization, composability, and security. However, with the emergence of Bitcoin-native programmability technologies (e.g., BitVM, Babylon, DLCs), it's now possible to use native BTC directly as a cryptographic input or trigger in smart contracts. Cardano and Bitcoin share the UTXO model, making native integration technically achievable. Yet, there is no developer-friendly backend that allows Cardano dApps to: Track and verify Bitcoin UTXOs. Use BTC transactions to trigger Plutus contract logic. Build BTC-backed applications without trust-minimized bridges. Without this, Cardano misses a significant opportunity to unlock Bitcoin liquidity and security while preserving its decentralization ethos.

This proposal upgrades Atlas PAB into a Bitcoin-aware smart contract backend, enabling developers to: Track native BTC transactions via full nodes or lightweight indexers. Define BTC-based triggers for activating Cardano Plutus endpoints. Verify BTC proofs (SPV, BitVM, Babylon) from off-chain or light clients. Write BTC-aware business logic in Atlas without custodial bridges. Synchronize Cardano and Bitcoin UTXO states to support secure BTC-backed workflows. This approach lets developers: Build BTC-backed stablecoins or vaults. Design Cardano NFT auctions triggered by BTC payments. Launch DeFi protocols collateralized by native BTC. Enable trustless cross-chain coordination between Bitcoin and Cardano. By enhancing Atlas to support Bitcoin natively, this proposal creates new opportunities for BTC holders and Cardano developers to collaborate securely.

• Atlas.Bitcoin Plugin Module Haskell
• module for BTC monitoring
• triggers Released on GitHub with examples
• BTC Trigger Framework
• JSON/DSL logic for defining
• BTC conditions Successfully
• triggers Atlas Plutus endpoints
• BTC Proof Verifier Support
• SPV/Babylon/BitVM proofs
• Validates proofs with sample BTC testnet TX
• BTC Metadata TrackerStore
• BTC txid + Cardano asset mapping Exposed via Atlas APIs
• Example dApp One BTC-native dApp with UI
• Contracts Live on testnet with tutorial documentation

Bitcoin Monitor Module: 180 hrs$ = 60,000 BTC Trigger Framework: 140 hrs = $45,000 BTC Proof Verification Layer: 130 hrs = $40,000 Metadata + Asset Tracker: 80 hrs = $25,000 BTC-aware dApp Example + UI: 70 hrs= $20,000 Documentation, QA, Community Testing— $25,000 Project Management, Buffer, Security— $35,000

Total = $250,000

Duration: 7 months Team: 3 Haskell engineers (Atlas, BTC protocols, cross-chain dev) 1 Developer Advocate (docs, UI, community testing) ~650 total hours

The Genius Yield team created and maintains Atlas PAB, and has: Built and maintained production-grade open-source infrastructure (Atlas, Genius Yield backend)

This proposal will be delivered in partnership with the Fluid Token team, pioneers in native BTC integrations and cross-chain infrastructure. Together, Genius Yield and Fluid Token bring deep expertise in Cardano and Bitcoin development, enabling high-confidence delivery of native BTC capabilities in Atlas.

The Bitcoin integration will become part of the open-source Atlas PAB repository https://github.com/geniusyield/atlas. Genius Yield Team will maintain version updates, support integration questions, and evolve modules based on developer feedback.

Cardano DeFi builders are eager to integrate BTC collateral in a trustless manner. Babylon, BitVM, and SPV systems are gaining developer traction. Proposal #323 (Cardano + Bitcoin) showed strong community support for BTC-native integration. Atlas is a widely used backend, and enhancing it with BTC support will have widespread impact.

Bitcoin Core node or light client indexer

Babylon proof format or equivalent SPV tools

Atlas open-source architecture (already available)