Oxfordpeptides openly does its testing 'in-house', i.e. the company selling the product also writes the certificate that says the product is good. There is no outside check anywhere in that loop; the purity figure is whatever they decide to print. Calling that a 'Certificate of Analysis' borrows the authority of independent testing while removing the one thing that gives it meaning, independence.
See the full audit. This is the short answer; the full Oxfordpeptides dossier has the certificate check with a live verification link, the Companies House record, pricing against the market and the complete checklist.
Oxfordpeptides (oxfordpeptides.com) is on The Peptide Watch's watch list. It does not publish a certificate of analysis that can be independently verified in its own name, so its quality claims rest on trust rather than checkable evidence. That is not proof of a scam; it means the evidence does not check out.
You cannot independently verify its testing today. A good delivery reputation is not the same as a verifiable certificate; the two are unrelated. Until Oxfordpeptides publishes an own-name certificate you can check on an independent lab's website, you are taking its quality on trust.
The Peptide Watch does not assert that. What is observable is the reason it sits on the watch list: grades its own homework (in-house). Being unverifiable is a reason for caution, not proof of fraud.
Not one that can be independently verified in its own name. They test their OWN product in-house and grade themselves, a company marking its own homework. Nothing stops them printing whatever purity number they like.