Is there a way to catch a dbcc checkident command
Sure, these are captured by the default trace (and maybe by extended events system_health session, not sure). Given the caveats in this answer (for example a command issued last year is unlikely to still exist in the trace):


What event information can I get by default from SQL Server?


You can see recent DBCC events here:

DECLARE @path NVARCHAR(260);

SELECT @path = REVERSE(SUBSTRING(REVERSE([path]), 
       CHARINDEX(CHAR(92), REVERSE([path])), 260)) + N'log.trc'
FROM   sys.traces
WHERE  is_default = 1;

SELECT TextData, ApplicationName, LoginName, StartTime, DatabaseName
  FROM sys.fn_trace_gettable(@path, DEFAULT)
  WHERE EventClass = 116
  --AND DatabaseName = DB_NAME() / or constant
  ORDER BY StartTime DESC;


Note, this will show more than just CHECKIDENT events, but you can filter that further. On the other hand, it might be useful to spot check what other DBCC commands are (or are not) being run, though.