You could register the title of your project, before your protocol at the start of the protocol development. The title would be listed on the JBI website. It would tell other individuals that this topic is being worked on by you and your team. It is not required to do this step however. The registration form is found in the JBI Manual for Evidence Synthesis, chapter 1, section 1.3.
To register your TITLE you would need to do the following steps:
If you do all that work, you might as well just register your protocol instead. Authors must register protocols in PROSPERO and report the registration number in the manuscript prior to publication in the JBIES
Once the scoping review protocol is registered with either of these resources, you will need to add the registration number to your accepted protocol prior to being published.