The phrase "a proven commitment" is correct and usable in written English.
It can be used to describe a demonstrated dedication or promise to a cause, task, or principle.
Example: "The organization has shown a proven commitment to environmental sustainability through its various initiatives."
Alternatives: "a demonstrated dedication" or "a verified promise".
Banking licenses could be made more readily available to well-capitalized entities with strong management teams and a proven commitment to serving local business.
The Chicago Lawyers Group, P.C. Awarded to lawyers who combine stellar legal credentials with a proven commitment to community engagement and the highest professional standards.
The theatre has won support from several figures in the arts, including Sir Nicholas Hytner, director of London's National Theatre, who said Rubasingham and her board had a proven commitment to Jewish culture.
But what is needed is a functioning five-member commission, including a strong leader with a proven commitment to investor protection and deep experience in markets, regulation and securities law enforcement.
It aims to foster the entrance of students from underrepresented minority groups, as well as others with a proven commitment to diversity, into PhD programs and faculty positions in academia.
McGrath said he was delighted by the appointment of Thiarai, who he said was "an inspiring leader with a proven commitment to extraordinary international theatre, and to deep engagement with the widest range of communities – she is a perfect choice for this fantastic job".
"Jeb has a consistent, proven commitment to promoting legislation that would advance the pro-life cause and appointing reliably conservative justices". .
"Steinhoff is a well-capitalised, international business with a clear and proven commitment to value retailing," he said.
"I do believe we're at a moment when Canada's proven commitment and reputation can profoundly affect how we think about these issues and what is possible to achieve"[ 37].
I prefer proven commitment and action, along with proven involvement and concern, not the status quo of what doesn't work.
The availability of five systematic reviews covering all the key interventions for the management of these fractures is an achievement, and one enhanced by the proven commitment to updating the reviews in the light of new evidence.
