Copyright attaches to original content at the moment of creation in most jurisdictions. A creator does not need to register anything or put a copyright symbol on a post for the underlying work to be theirs. This is the piece that most creators know. The piece they know less well is everything that comes after: what protection actually means in practice, when it fails, and what tools exist to enforce it.
The gap between owning a copyright and being able to enforce it is significant. Content that is copied and reposted without attribution is technically infringing, but identifying the infringement requires monitoring, proving the original work requires documentation, and pursuing the infringer requires either a platform takedown process or legal action. Most creators do neither, not because they do not care, but because they have no infrastructure to support either response.
Timestamped documentation changes the enforcement calculation. When a creator has a verifiable record: ideally with a third-party timestamp: of when a piece of content was created and first published, disputes about originality become far easier to resolve. Platforms process takedown requests more efficiently when the original creation date can be demonstrated. Legal processes, where necessary, are faster and cheaper.
The second gap is in commercial agreements. Many creators sign usage rights clauses without fully understanding what they are licensing. A brand that pays for a 30-day organic post and then runs it as a paid ad for six months is not making a business mistake: they are exploiting a gap in the contract. Creators who understand what their content is worth and document their rights accordingly close that gap before it costs them.