The phrase "as it proclaimed" is correct and usable in written English.
You can use it when referring to something that has been declared or stated, often in a formal or authoritative context.
Example: "The document was clear in its intentions, as it proclaimed the need for immediate action."
Alternatives: "as it stated" or "as it declared".
Whereas "Comeback" was replete with colourful stories set in smoke-filled rooms with big personalities and swashbuckling deals, her book digs out the underlying story that was gnawing at Detroit's entrails even as it proclaimed its revival.
Billboard magazine first appeared in 1894 to cover the outdoor advertising market, reporting on "all that is new, bright and interesting on the boards," as it proclaimed in its first issue.
New York was among the first states to try the new technology, and as it proclaimed success against welfare cheats, other states followed.
There is little doubt that the IRS will declare the Voluntary Disclosure program to be a great success, just as it proclaimed the settlement with UBS, which will yield 4,500 names of Americans with undeclared accounts to be a great victory (even though the IRS initially sought 52,000 names).
In June of 2014, Laverne Cox was on the cover of Time Magazine as it proclaimed The Transgender Tipping Point.
Although fictional movies are supposed to take liberties with prosaic reality, "Mo' Better Blues" skews things to no apparent purpose, even as it proclaims its verisimilitude.
Isn't the NCAA really foremost about education, as it proclaims in its legal pleadings.
Buy from Amazon.com, Amazon.co.uk WE ARE as gods and might as well get good at it," proclaimed Stewart Brand, an American environmentalist, as he introduced the cornucopia of tools and ideas that made up his Whole Earth Catalog in 1969.
THE Turner Classic Movies cable channel prides itself on running films that are, as it proclaims, "uncut and commercial-free".
Rather than being armed with 'nothing but peer-reviewed science', as it proclaims, it seems to be armed with ill-founded suspicion.
When executives at the Publishing Corporation of America chose Spry as the name for their new Sunday newspaper supplement "celebrating the vitality in all of us," as it proclaims on the cover, did anyone remind them that Spry was the name of a brand of vegetable shortening, sold by Lever Brothers, that competed against Crisco?
