Based on a conversation here… Unofficial Tumult Hype CDN …a new security link was added. It’s a way to generate a Subresource Integrity hash, based on the URL of a file. It’s useful if you’re using a Content Delivery Network (CDN) to host the Hype runtime JavaScript file.
Of course, just how Monk uses a level to check his level, https://www.srihash.org is a third-party website. So you’d need a Subresource Integrity hash generator checker to verify the authenticity of the code. 
In other words, you could also use the terminal to generate the hash locally. That website tells you how to do it, in the “How can I generate Integrity hashes?” section.