> For the complete documentation index, see [llms.txt](https://corpus-core.gitbook.io/whitepaper-colibri-stateless/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://corpus-core.gitbook.io/whitepaper-colibri-stateless/technical-concept/stateless-verification-and-efficient-data-retrieval.md).

# Stateless Verification and Efficient Data Retrieval

## Overview of the Architecture

Corpus Core's **colibri.stateless** Client (C4) is a trustless, stateless client designed for secure and efficient blockchain verification. It operates without maintaining a blockchain state or participating in the peer-to-peer network, instead relying solely on cryptographic proofs for verification.

* **Stateless Design**—This design does not store blockchain history but verifies state transitions, account information, and transaction information using cryptographic proofs.
* **Proof-Based Verification**—This method authenticates blockchain data using sync committee signatures, Merkle proofs, and zk-proofs. Additionally, in Layer-2 usage, it verifies rollup proofs, including zero-knowledge and fraud proofs, ensuring the correctness of Layer-2 state transitions.
* **Multi-Chain Compatibility**—Supports multiple Layer-1 and Layer-2 networks for interoperability.