oembed - how is the scheme URL published?

Question

Providing discovery of your web page in oembed means adding a link such as

<link rel="alternate" type="application/json+oembed"
 href="http://flickr.com/services/oembed? 
url=http%3A%2F%2Fflickr.com%2Fphotos%2Fbees%2F2362225867%2F&format=json"
 title="Bacon Lollys oEmbed Profile" />

so thats a item URL of http://flickr.com/photos/bees/2362225867/&format=json

However the URL scheme for this general area in flicker is

http://www.flickr.com/photos/*

and this ends up in the following JSON

https://oembed.com/providers.json

as an entry of

{
    "provider_name": "Flickr",
    "provider_url": "https://www.flickr.com/",
    "endpoints": [
        {
            "schemes": [
                "http://*.flickr.com/photos/*",
                "http://flic.kr/p/*",
                "https://*.flickr.com/photos/*",
                "https://flic.kr/p/*"
            ],
            "url": "https://www.flickr.com/services/oembed/",
            "discovery": true
        }
    ]
},

Where is this scheme URL obtained from as I don't see it explicitly declared anywhere?

The provider's JSON is supposed to be maintained through discovery via the original s but they do not contain the scheme URL (with the wildcard *'s).