Haciyev Reşit 
In the blockchain world, trust, identity, and data ownership are becoming increasingly important. Especially in DeFi, RWA (real-world assets), and AI-based applications, the verifiability of users’ identity information is a critical need. This is where BAS (BNB Attestation Service) stands out as a universal identity and reputation layer within the BNB Chain ecosystem.
Positioning of BAS
BAS operates with both on-chain and off-chain attestation mechanisms.
- On-chain mode: Transparent verification records visible to everyone.
- Off-chain mode: Access-controlled, user-specific data management via Greenfield integration.
This structure allows BAS to provide a reliable data verification infrastructure not only for Web3 but also for diverse use cases such as RWA, regulation-compliant DeFi, and AI agents.
Technology and Architecture
Key concepts offered by BAS include:
- Schema: Defines how data will be structured and processed.
- Resolver: Implements more complex verification logic.
- Access Control: Determines who owns which data and who can read it.
Additionally, BAS provides SDK and GraphQL API support for developers, making dApp integration easier and ensuring that data flow is secure and modular.
Relationship with Greenfield
BAS leverages BNB Greenfield for off-chain verification and storage, allowing:
- Users to retain ownership of their data,
- Selective verification when needed,
- Data to remain private and not unnecessarily public.
This approach bridges Web2 and Web3, advancing the concept of user-owned data.
Ecosystem Role and Scale
According to official data, BAS currently supports:
- 40M+ attestations,
- 2.5M+ addresses,
- 100+ ecosystem partners.
These figures demonstrate that BAS is not just a technical infrastructure but has become a core verification and reputation layer for BNB Chain. With tools like BNB Passport and Explorer, users can reuse their identity and reputation across multiple applications.
Token Economics
According to CoinMarketCap, the BAS token has:
- Maximum Supply: 10 billion
- TGE and Distribution Details: Partial information available as of July 2025
Important Note: Official disclosures are limited. Investment or usage decisions should always rely on official announcements, contract addresses, and technical documentation.
Potential Ways the Token Could Capture Value:
- Usage-driven demand: More integrations and attestation calls.
- Ecosystem engagement: Through BNB Passport, task systems, and multi-dApp usage.
- Compliance and privacy needs: For RWA and institutional DeFi solutions.
Ecosystem Partnerships
BAS has received BNB Grants and participated in the MVB incubation program. It is also connected with the DataFi/RIDO team.
These collaborations enable:
- Establishing Web2 ↔ Web3 data standards,
- Implementing task → reputation → identity flows,
- Developing enterprise-level data verification services.
Roadmap and Future Plans
BAS’s development progresses along three main tracks:
- Standards: Schema/resolver enhancements and revocation mechanisms.
- Productization: Development of BNB Passport, Explorer, and task entry points.
- Ecosystem: Ready-made template integrations for DeFi, RWA, and AI applications.
Additionally, the SDK and GraphQL documentation for developers are planned to be expanded.
Key Takeaways
- BAS serves as the universal identity and verification infrastructure for BNB Chain.
- Its dual-mode structure (on-chain + off-chain) ensures both transparency and privacy.
- Integration with Greenfield gives users full control over their data.
- As the token economy is still developing, official announcements are critical for investment or usage decisions.
- The ecosystem size, partnerships, and incubation programs highlight BAS’s strategic importance in the Web3 space.
Official Links: