If there is a change in the ownership of a recording, the ISRC should not be changed.
Once an ISRC has been assigned, the Registrant Code itself should not be used to directly infer ownership.
This is in keeping with the principle that the ISRC is to identify the recording rather than other factors such as ownership at a given point in time.
Since ownership often changes due to licensing or acquisition, ownership data should be held in databases, where it can be updated when necessary. ISRC can then be used to look up information about the identified recording. The role of ISRC is to give clarity about which recording is the subject of interest.