Can I add my ORCID to my accepted (no longer in Sage Track)/published paper?

Unfortunately, it is not possible to retrospectively add an ORCID to an accepted/a published manuscript as all IDs must be validated during the submission and peer review process.  

However you can manually add a paper to your ORCID record once it has been published. For more information, please see Add works to your ORCID record – ORCID. However, your ORCID ID/ORCID logo will not appear on the published paper unless it has been authenticated prior to being accepted.