Canonical organization registration (eg OpenCorporates) URL for the reporting organization

[timcowlishaw]

In the first version of the schema, @cronky proposed a block like this under the organization for linking to the OpenCorporates URL for the reporting organization:

"open_corporates_url": {
          "type": "string",
          "format": "uri",
          "description": "Open Corporates URL for the reporting organisation, providing a verifiable corporate identity (e.g. 'https://opencorporates.com/companies/gb/12345678')."
        },

@fershad pointed out on #31 that:

This doesn't cover all regions (quick check, no corporates from Taiwan).
Could we say "organisation entity uri" or "organisation entity registration uri" instead? Links can then be included to local business registration uris like https://findbiz.nat.gov.tw/fts/company/82954243?fhl=en

For now, I've removed this block as I don't think it's essential for v0.0.1, and created this issue to better define how to take this forward in a future version

[timcowlishaw]

In our meeting on the 13/07/26 we agreeed to maintain open_corporates_url as an optional field in v0.0.1 and return to consider how we might support other registries in a later version. @mrchrisadams pointed out that this is also prescient because of the new opencorporates p-lei initiative