The phrase "decided to confirm" is correct and usable in written English.
You can use it when indicating a choice made to verify or validate something.
Example: "After reviewing the details, I decided to confirm the meeting for next week."
Alternatives: "chose to verify" or "opted to affirm".
The word leaked out in Toronto, however, so Nicolosi decided to confirm the signing.
Rather, the somewhat unconventional way he decided to confirm the long-rumoured news.
The officials said they decided to confirm his identity today after some news organizations made clear that knew the captured terrorist was Mr. Nashiri.
Last week, after years of denial and self-deception, I decided to confirm to some supportive friends what they will have suspected for a while anyway.
He emphasized that he had decided to confirm the man's illness as SARS, even though it did not meet the World Health Organization's definition.
But late yesterday afternoon, the Koch administration, after considerable internal debate, decided to confirm that the investigation involved the Buildings Department.
"Over the next two weeks, we hope that they will decide to confirm their real name, change their name to their real name, or convert their profile to a Page".
CAF said in a statement: "CAF decided to officially confirm the result of the match as 2-0 in favour of Ivory Coast … and to consider Senegal the loser of the said match and eliminated from the competition without prejudice to any other sanctions that may be imposed by CAF disciplinary board".
CNN and I decided to publicly confirm the film project to clear the air.
We decided to experimentally confirm localization of the nuclear-encoded putatively plastid targeted Psb28 protein from T. pseudonana and to perform extensive phylogenetic analysis to specify the origin and location of the Psb28 protein in diatoms.
We also decided to further confirm erythroid commitment of ALDH+CD34- cells in a disease model.
