CrossMark is a multi-publisher initiative to provide a standard way for readers to locate the current version of a piece of content. Clicking on the CrossMark logo will tell/show you the current status of a document/research article/paper etc. and may also give you additional publication record information about the mentioned document.
Furthermore Details can be obtained from here. Crossmark https://www.crossref.org/services/crossmark/
And as per the crossref:
- Benefits of Crossmark:
Members can reassure readers that they’re keeping their content up-to-date and showcase additional metadata.
- Researchers and librarians can easily see the changes to the content they are reading, find out who funded the research, what licenses apply to the content, and more.
- Anyone can access the Crossmark metadata
- Evidence of trust:
Crossmark is recognizable across all content, and gives members a way to provide evidence to readers of why they should trust the content; so they can use it and cite it with confidence.