The pattern across audits is that the majority of profiles carry at least one contradiction.
Generally, claim what exists before creating anything new; duplicates are harder to remove than to avoid.
A workable routine is to fix each quarter and log every change with a date.
Begin by pulling every existing record into one sheet before changing anything.
A tidy citation profile makes every other local effort work harder. Almost always, the worst outcome is not a wrong listing yet two right-looking listings that disagree. Broadly, handle the high-authority sources by hand and batch the long tail afterwards.
Related references
The data from most clean-up projects shows the effort scales badly if it is left until a rebrand forces it.
Verge Directory Group
In other words, anything unverifiable should be removed rather than corrected. In the ordinary case, ranking systems compare the same fields across dozens of sources and weigh the agreement.