A value for the 'checksum' image property will no longer be computed from Victoria onwards. The field itself will remain (so no change in the API response).

Current text is:

Hash that is used over the image data. The Image service uses this value for verification. The value might be null (JSON null data type).

Should change to something like:

An MD5 hash over the image data. The value might be null (JSON null data type), as this field is no longer populated by the Image Service beginning with the Victoria release. It remains present for backward compatibility with legacy images. To validate image data, instead use the secure multihash fields ``os_hash_algo`` and ``os_hash_value``.