Resolve a DOI, PMID, PMCID, ISBN, arXiv ID, ISSN, or ADS bibcode into a clean, formatted citation in Vancouver, APA, AMA, IEEE, CSE, or any of 10,000+ CSL styles. Verify whether a citation is real — it cross-checks the claimed title and authors against the actual record at the identifier, catching the common pattern where a real DOI is paired with a fabricated or mismatched title. Check whether a paper has been retracted, corrected, or had an expression of concern raised. Results show in a citation card with the verdict, the formatted reference, and the source identifier.