We welcome and encourage community use of ORCID iDs. Our recommended display is a full https URI preceded by the iD icon, both hyperlinked to the URI:
The iD icon must be displayed to meet our Collect & Connect Display badge requirements. If necessary, the ORCID iD may be displayed without the iD icon, though we strongly encourage its use, in order to signal to the community that an iD is being - or has been - used.
https is mandatory, too.