"seems confirmed" is correct and usable in written English.
You can use it when something appears to be true or factual based on available evidence. For example: "The theory that she was the perpetrator of the crime seems confirmed by the witness testimony."
But the suspicion seems confirmed when I ask if he's found it rewarding to see many of his climate change warnings endorsed by the IPCC.
The general tenor of the relationship seems confirmed by his father's later judgment that "Stephen spends a lot of time on things that aren't worthy of him".
It takes time, and some effort, to adjust to the new tempo, and the sensation that we are observing a state of mental unrest seems confirmed.
This seems confirmed as the government announced that more than 300,000 disabled people will have their benefits cut although the change has been delayed for two years.
That something like this--overt, rather than covert--happened seems confirmed by a letter that Lord Salisbury wrote to his wife years later.
But the prospect that Mr. Holloway finds the form-content duality as stupid as he makes it look is comforting, and seems confirmed by "Dialectic," which is much stronger.
This would seem confirmed by nothing so much as the autobiographical facts supplied by Fried himself.
The nation's fears seemed confirmed — the anarchists had initiated their terrorist attack on the institutions of civic order.
The bat makers' claims of extra power seem confirmed by a 54percentt increase in home runs since 1994.
His warning seemed confirmed in the rubble, shredded cars and body parts at the sites of the two bombings.
Those fears seemed confirmed a year ago when television stations broadcast excerpts from videocassettes in which he seemed to urge his followers to "patiently and secretly" infiltrate the government.
