Crossref
Crossref is a nonprofit scholarly publishing infrastructure organization established by academic publishers to assign and manage Digital Object Identifiers (DOIs) for academic literature, enabling persistent linking and citation tracking. Its core services include metadata registration, citation linking, and open API retrieval. Crossref serves academic publishers, libraries, research institutions, and developers, and constitutes a key infrastructure for the interconnection of scholarly information.
Core Facts
Timeline (last 90 days)
Optimist Deep Research's search intents are translated into specific queries targeting arXiv, OpenAlex, Crossref, PubMed, Semantic Scholar, and the open web.
After a paper is retracted, the publisher issues a retraction notice, but this status is usually not automatically written into the paper's PDF or HTML body; instead, it exists as a separate record in Crossref, the Retraction Watch database, or the publisher's page.
For teams building research-oriented AI products, the recommendation is not to let the agent pick sources on its own, but to put retraction checks (using Crossref and Retraction Watch data) into the pipeline, executed before the model reads the content.
StrictCite makes hard API cross-references against 13 academic registries including Crossref and DBLP
All Facts (5)
Crossref manages more than 150 million DOI records and is the world's largest academic literature metadata registration organization.
65%UnverifiedOptimist Deep Research's search intents are translated into specific queries targeting arXiv, OpenAlex, Crossref, PubMed, Semantic Scholar, and the open web.
50%UnverifiedAfter a paper is retracted, the publisher issues a retraction notice, but this status is usually not automatically written into the paper's PDF or HTML body; instead, it exists as a separate record in Crossref, the Retraction Watch database, or the publisher's page.
50%UnverifiedFor teams building research-oriented AI products, the recommendation is not to let the agent pick sources on its own, but to put retraction checks (using Crossref and Retraction Watch data) into the pipeline, executed before the model reads the content.
50%UnverifiedStrictCite makes hard API cross-references against 13 academic registries including Crossref and DBLP
50%