When researching a pedigree article, I rely on several resources. Some of them are free and some of them are not. Some of them I have been using for decades and some of them are recent additions. And some of them I have created for my own use.
While I created a pedigree database for myself and have saved media releases for decades, I also use the internet. Here are some internet resources and a bit about them:
http://www.brisnet.com/ – This is a membership site for accurate Thoroughbred pedigrees and up-to-date race earnings, and, as a bonus, some of the reports are free. I use this site frequently.
http://www.equineline.com/ – This is a membership site for accurate Thoroughbred and Quarter Horse pedigrees and up-to-date race earnings.
http://www.pedigreequery.com/ – This is a free pedigree site for Thoroughbreds, but not always accurate or up-to-date. There are numerous misspelled horse names as well as fantasy horses. Use caution before accepting the information as truth since anyone can enter information on the site.
http://www.sporthorse-data.com/ – This is a free pedigree site for sport horses with relatively few errors, primarily in the English disciplines. There are photos associated with many of the horses. I use this site frequently in combination with the FEI site below.
https://data.fei.org/ – It is searchable by several categories (event, horse, person, rankings) and by FEI discipline. I use it primarily for the horse information: year of birth, registry, previous name(s), sire, dam, dam’s sire, breeder and owner. Unfortunately, the information is not always complete.
http://www.allbreedpedigree.com/ – This is a free pedigree site for any breed of horse, but not always accurate or up-to-date. I strongly suggest double-checking the information through a more reliable source. One does not want to promote a fantasy horse rather than the real horse.
http://www.horseresourceofcourse.com/ – A new multi-discipline site that is, as the headline says, “A Wealth of Information – Releases, Results & Upcoming Events in the Horse World.” It is searchable, which makes it valuable for current and, with time, historical information. One to keep your eye on!