Most of it is Scripture. But then, you may not believe that.
No, it is not Scripture. It is a writing about Scripture. I was not denigrating that, any more than the DRB or the AV Bibles. I am only saying that neither the current creed, nor those Bibles, are inspired.
And for sure, the extra line placed in the Apostles Creed is absolutely not Scriptural nor inspired. There is no phrase "catholic church" (capitalized or not) in the whole Bible. Nor was it in the original Roman Creed (which was/is satisfactory to me) before it was "mended" a few hundred years later.