Chaucer's blooms are much bigger than the bloom on your rose.
Here's my guess, and it's prompted mainly by the fact that it came from Rogue Valley Roses. For years now, they've been offering Blessed Child as a free rose, and many of the mystery roses I've received from Rogue Valley also have turned out to be Blessed Child.
Rose (Rosa 'Blessed Child')
https://www.roguevalleyroses.c...