Dataset metadata like https://data.opensanctions.org/datasets/latest/default/index.json and https://data.opensanctions.org/datasets/20260622/default/index.json will start using https://data.opensanctions.org/artifacts/ URLs for resources, and its own 'index_url', starting today. This should be transparent to anything using resource URLs unless some kind of restriction on the path in the URL has been imposed by an integration.
The index.json and resource files will continue being available ...