> For the complete documentation index, see [llms.txt](https://docs.teranode.group/tng-identity-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.teranode.group/tng-identity-documentation/did/bsv-did-universal-resolver/how-it-works.md).

# How It Works

## How It Works

1. You request the resolution of a DID via the Universal Resolver API.
2. The service:
   * Validates the DID.
   * Loads transaction history from the **BSV blockchain** via the WhatsOnChain API.
   * Reconstructs the current DID Document.
   * **Caches** the DID Document internally
3. The service returns a **standards-compliant DID Resolution Result**, including metadata and any applicable errors.

***

## Limitations

* Currently supports only the BSV method (did:bsv).
* Response times may vary depending on blockchain lookup times by WhatsOnChain and length of the transaction chain.

***

## Support and Resources

* **Source Code**: [Resolver Driver Repository](https://github.com/your-repo)
* **WhatsOnChain API**: [WhatsOnChain Docs](https://docs.whatsonchain.com/)
* **W3C DID Specification**: [DID Core Specification](https://www.w3.org/TR/did-1.0/)
* **W3C DID Resolution Specification**: [DID Resolution Specification](https://www.w3.org/TR/did-resolution/)
* **Issues**: Report bugs and request features via GitHub Issues


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