The Catholic Church does not claim "new information" and it is the Catholic clergy who wrote the "original manuscripts".
While Scripture provides for the magisterium and which is critical, the way God often preserved truth was by raising up true prophets (not Benny Hinn) from outside its ranks to reprove them such as for teaching mere traditions of the elders as doctrine, which what the Lord Himself reproved them for. (Mt. 15:2ff)
In addition, most of the Bible was already established as Scripture (Lk. 24:27,44; Acts 17:2,11; 18:28; 28:23) by the time period of Christ, essentially due to its heavenly and enduring qualities and effects and often by other supernatural attestation, and conflation and complementarity with what was prior established as being from God.
(In which the Lord revealed Himself to Abraham and supernaturally confirmed their faith and positive morality, and which Moses upheld and expanded upon, with God supernaturally establishing His authority, and the Law which He wrote, and which became the standard for obedience and for testing Truth claims, as a continuing principle.)
Like prophets, wise men and scribes before Him and who would come, (Mt. 23:34) the authority of Christ Himself did not come from being ordained or recognized by the formal magisterium, nor did His forerunner John the Baptist, which was a real problem for the Pharisees who yet had positional authority, and thus Christianity began as a virtuous rebellion. The Lord established His claims by referencing Scripture and the manner of effectual attestation it evidences being given to Truth, and a God can raise up children to Abraham from stones, (Mt. 3:9) so can He raise up stones to continue to build His church by demonstrable faith, though they be rejected by those who presume to sit in supreme over Scripture (which is what most cults effectively do) and who foster trust in itself.
The Truth of God today is established as being the church of the living God today only insofar as it manifests conformity to the Scriptures in doctrine, love, holiness and in power, with the gospel of grace effecting manifest regeneration with its fruits. For the "For the kingdom of God is not in word [self-proclamation or structure or the sword of men], but in power." (1 Corinthians 4:20) To the glory of God who alone shall be exalted. (Is. 2:11) May its tribe increase, though i come short.