> For the complete documentation index, see [llms.txt](https://docs.canhav.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.canhav.com/agent-launch-not-started/registry-addresses.md).

# Registry addresses

**Not started.** The Agent / ERC-8004 product track is not started. These pages are retained for reference only. Do not treat register/browse copy below as a shipped CanHav product commitment.

Base Sepolia (chain ID `84532`). CanHav does not own these contracts. Confirm on [Blockscout](https://base-sepolia.blockscout.com).

## Configured testnet registries

| Registry            | Address                                                                                                                                |
| ------------------- | -------------------------------------------------------------------------------------------------------------------------------------- |
| Identity Registry   | [`0x8004A818BFB912233c491871b3d84c89A494BD9e`](https://base-sepolia.blockscout.com/address/0x8004A818BFB912233c491871b3d84c89A494BD9e) |
| Reputation Registry | [`0x8004B663056A597Dffe9eCcC1965A193B7388713`](https://base-sepolia.blockscout.com/address/0x8004B663056A597Dffe9eCcC1965A193B7388713) |

Identity Registry deploy block (indexer start): `36304145`.

## Safety: vanity prefix

| Network      | Identity prefix |
| ------------ | --------------- |
| Base Sepolia | `0x8004A818`    |
| Mainnet      | `0x8004A169`    |

Every CanHav layer (site banner, verify script, agents indexer startup) **refuses** an Identity Registry address that does not start with `0x8004A818`. If you see a configuration error about the prefix, you almost certainly pointed at mainnet by mistake.

## Related

* [What is ERC-8004](/agent-launch-not-started/what-is-erc-8004.md)
* [Network setup](/agent-launch-not-started/network-setup.md)
* [FAQ](/agent-launch-not-started/faq.md)


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