No, there is no formal certification or approval for loading inventory to CMDP.
To test that the data flow is correct you may want to modify a point of inventory in your system, and then, following your regularly set update time (such as daily at 11pm), review via CMDP to see if that inventory point reflected the modification.
For SDWIS State primacy agencies: You may also want to review the Tomcat console statistical summary of the 4 data migrations: reads, writes, commits, and rollbacks. This is a technical assessment of the migrated data quality based on the queries and the Data Quality Checklist.
For S/Free primacy agencies: do you have the ability to summarize your data migration statistics to get a big picture perspective on the total number of records successfully transferred?