keystone  [kiːstəʊn/noun]

“a central stone at the summit of an arch, locking the whole together”

“the central principle or part of a system, on which all else depends foundation, basis, cornerstone, base, principle, guiding principle, core, heart, centre, crux, fundament, priority”

In 2016, whilst teaching the advanced principles of knee chest upper cervical specific in Barcelona Bill met Sophie. They instantly recognized the common passions and vision that they shared for bringing this type of care to the world. Amongst the intensive teaching and the sight-seeing, the birth of Keystone Specific Chiropractic Center in Barcelona began. With the rest of the team, they pride themselves on being part of a select community of chiropractors around the globe (currently estimated at around 2% of the chiropractic profession) who have committed to the intensive studying, practice, and dedication to become upper cervical knee chest, specific chiropractors.

DR. Sophie Anderson

Sophie’s Mum was the first to suggest she should consider being a Chiropractor after her first consultation at the age of 15. Knowing Sophie’s passion for people, love for the body and fascination with life she saw it as the perfect combination. It wasn’t until four years later when posed with the question “what kind of person do you want to be and what kind of life do you want to live?” that Sophie finally realized the wisdom in her Mum’s words.

Fast Forward another eight years: Sophie’s first job was in London which she left after to explore the world of traditional Chiropractic further. She worked across the UK in a multitude of clinics whilst the owners were away on holiday. This exposed her to many different approaches but highlighted one glaring truth: traditional chiropractic worked, just not for every person. Knowing the basic principle that when the brain, brainstem and nerve system are working the body can heal itself this left her with one huge question: why?

During these three years in her free time she conducted her own ‘chiropractic tour’ and traveled across the globe; to Australia, New Zealand, the USA and Spain to connect with chiropractors doing many different things that didn’t even exist in the UK. It was during this time that she heard multiple ‘miracle’ stories; scenarios where people were in the worst states of health, or perhaps even on the brink of no longer living and something turned everything around. That ‘something’ was a specific, upper cervical chiropractic adjustment.


Dr. Bill Moss


Dr. Bill Moss was born and raised in Reading Pennsylvania. He received a bachelor’s degree in education, and taught high school emotional support/special education, prior to receiving his doctor of chiropractic degree at Life University in Marietta GA.

Dr. Moss chose to become a chiropractor after personally receiving incredible results including healing from asthma, allergies, skin conditions, pain, and discomfort. Ultimately, Dr. Moss made the decision to attend chiropractic school after experiencing complete resolution of debilitating anxiety and panic attacks. After seeking treatment from multiple doctors, receiving multiple medications, with little help and little success, Dr. Moss met a chiropractor that taught him what chiropractic is, and how the body can heal naturally with a high functioning nerve system.

Dr. Moss has taught and trained chiropractors and chiropractic students in Upper Cervical Chiropractic throughout the country, and around the world. He established a Keystone Specific Chiropractic Center in Barcelona, Spain which is the first upper cervical only office in Spain.