It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
According to the organization website, "COPE is committed to educate and support editors, publishers and those involved in publication ethics with the aim of moving the culture of publishing towards one where ethical practices becomes a normal part of the publishing culture."
"HelioBLAST is a free service provided by HelioText. The HelioBLAST text similarity engine finds text records that are similar to the submitted query...Here, your query is searched against the citations (abstract and titles) in Medline/PubMed." -- https://helioblast.heliotext.com/
"Zotero can now help you avoid relying on retracted publications in your research by automatically checking your database and documents for works that have been retracted." Zotero provides this service in partnership with Retraction Watch.
"Retraction Watch is a blog that reports on retractions of scientific papers. The blog was launched in August 2010 and is produced by science writers Ivan Oransky (Vice President and Global Editorial Director of MedPage Today and Adam Marcus (editor of Gastroenterology & Endoscopy News)." -- Wikipedia as viewed on 4/7/2017
A commercial subscription product. There is a limited free level at the time of this writing (2/2021) "Launched in November, Scite Reference Check scans new article PDFs for references to retracted papers, and posts both the citing and retracted papers on Twitter. It also flags when new studies cite older ones that have issued corrections, errata, withdrawals, or expressions of concern. An extension of scite.ai, a platform that monitors whether research findings are supported or contradicted by subsequent studies, Scite Reference Check keeps track of retracted papers by trawling through Crossref, PubMed, and the Retraction Watch Database."