If you are preparing your paper in LaTeX and you are using the IEEE tran document class, this may help

• Add the following code before the \maketitle command:
  \IEEEoverridecommandlockouts
  \IEEEpubid{\makebox[\columnwidth]{978-1-7281-4757-4/19/\$31.00~\copyright2019 IEEE \hfill} \hspace{\columnsep}\makebox[\columnwidth]{ }}
• Add the following code after the \maketitle command, somewhere in the second column of the first page:
  \IEEEpubidadjcol