At this point, we are opening the pre-registration process for new stake pools. As an operator of a public stake pool, you can pre-register it with the official Incentivized Testnet stake pool registry, which is run by the Cardano Foundation. You will need to provide signed submissions in the form of Github pull requests into this registry. For details on how to register your stake pool, see the Incentivized Testnet registry GitHub page. If you pre-register your stake pool at this point, your pull request will remain open until the point at which the complete network functionality is available, when it will be merged and officially registered. Once your stake pool is fully registered it will appear as a delegation option in the supported testnet wallet Daedalus.
These submissions are subject to checks and human vetting to ensure that they are well-formed, before being merged to the master repository. There are some rules and semantics that you should be aware of when submitting to the registry, please check the registry rules before you make your submission. You should also refer to the usage policy for compliance and legal information to ensure your pull request is accepted.
See also Cardano Foundation Trademark Policy