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The OC will be listed on a CR pulled direct from the CB. 3rd party pullers can not show it.
If you haven't already pulled you free CR you can do so at https://www.annualcreditreport.com/cra/index.jsp
You might also get the info by calling the CB.
When you get the name of the OC and if you do owe it, Pay the OC not the CA. You can then use the HIPAA process to have the reporting deleted.