#TBC# According to the search results, **TBC Public Chain (Turing Bit Chain) has achieved Open Source**, but the open-source process is being promoted in phases, and some components may still have restrictions. Here are the key information整理:

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✅ 1. **Open Source Status and Timeline**
- **Completion of Open Source in Q1 2024**:
The official announcement states that the Layer2 Alpha version of TBC will be deployed in December 2023 and plans to complete the Open Source in **Q1 2024**. This information has been confirmed through multiple channels.
- **Code is Open Source**：
Users can access open source platforms like GitHub to view the TBC code repository, including contributor records and core protocols (such as the UTXO Smart Contract Engine). Community members have pointed out that those questioning the lack of open source can "check the Black Cat official website and CK audit" for verification.
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⚠️ 2. **Some components have Open Source restrictions**
- **Phased Open Source of Node Software**:
Although the main chain code has been Open Source, the **testing framework and development tools** for high-performance node software were in a limited open state, requiring developers to "contact for one-on-one cooperation" to obtain access. The official statement says that it will be gradually opened to the public "after improving the open source agreement."
- **Compliance and Intellectual Property Protection**：
TBC emphasizes that the node software is protected by intellectual property rights and manages early mining through KYC mechanisms, which may affect the fully decentralized Open Source process.
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🔧 3. **The Practice of Open Source Technology**
- **Developer Ecosystem Development**：
TBC actively promotes developer participation, such as the "Asia-Pacific Hackathon Competition" launched in 2025, focusing on Bitcoin Layer 2 application innovation, indicating that its open source ecosystem has entered the practical stage.
- **Smart Contract and Protocol Openness**：
Core innovations such as **UTXO model Turing complete smart contracts** (TuringContract), **T11 atomic cross-chain protocol**, and other technical documents and contract codes are all publicly available for review, supporting third-party development of DeFi, NFT, and other projects.
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💎 Summary
- ✅ **Open Source**: The TBC main chain code will be open sourced in the first quarter of 2024, available on GitHub, and will accept community audits.
- 🔧 **Partial Progressive Open Source**: Node toolchain and other components will be gradually opened as planned, and compliance application is currently required.
- 🌱 **Open Source**: Promote open source collaboration through hackathons, global developer programs, etc.
It is recommended to directly visit the [TBC official GitHub repository] or community forum for the latest code updates. For verification of the audit reports, you can refer to the public documents from third-party organizations (such as the Black Cat official website, CK Audit).