# Revow > An open lab for binding professional licences to keys. It publishes seven open > specifications and a hand-checked index of what credential registers around the > world actually publish. Everything is CC0 1.0 and free to implement. Every page on this site is also served as plain Markdown at the same address with a `.md` suffix, for example https://revow.org/model.md. The whole index is available as one file in JSON or CSV. ## Data - [Register index as JSON](https://revow.org/registers.json): every surveyed register with its grade, source and finding - [Register index as CSV](https://revow.org/registers.csv): the same rows, flat - [Specifications as JSON](https://revow.org/specs.json): the seven documents with status and version - [Notes and changelog feed](https://revow.org/feed.json): JSON Feed 1.1 ## The protocol - [Model](https://revow.org/model): how a claim is made attributable, dated, checkable and revocable - [Levels of proof](https://revow.org/levels): the four layers of evidence and what each one does not prove - [Specifications](https://revow.org/specs): RVW-1 to RVW-7 - [One claim, end to end](https://revow.org/walkthrough): a single document followed from signature to decision - [Glossary](https://revow.org/glossary): the words this site uses in a precise sense ## The evidence - [Register index](https://revow.org/registers): what credential registers publish, by hand, with dates - [By jurisdiction](https://revow.org/jurisdictions) - [By trade](https://revow.org/trades) - [Open problems](https://revow.org/lab): what this lab cannot answer yet - [Citing the index](https://revow.org/cite) ## For issuing authorities - [What is being asked](https://revow.org/authorities): one file, what it costs, and what it is not - [RVW-5, the authority file](https://revow.org/specs/rvw-5) ## Notes - [Where this sits](https://revow.org/prior-art): how Revow relates to W3C Verifiable Credentials, eIDAS 2, ERC-8004 and DIDs