>>>> registration papers done have race history on it. theyre just the registration. decribes the horse- tattoo, markings/color, sex, atlered sex or not, age, birth date/place, owners, etc.
I have three Jockey-Club -registered TB mares, and all three have every one of their race wins at a recognized track recorded on their registration papers. They are handwritten in the section on the bottom of the papers which says "OFFICIAL RECORD of races won in the United States, Canada, and Puerto Rico", where there are columns and lines printed for the specific purpose of recording each win-- along with the date, $ amount won, type of race, distance, name of track, and the signature of the Racing Secretary or an authorized agent from that track.
To find out other placings and earnings other than from wins you have to check Equibase, and for unrocognized starts (like at a fair or etc.) you would need info from the owner/that track/race, but TB wins from official starts at recognized tracks are indeed recorded on their registration certificates.