ATTESTED
attested, authenticated, documented
(adjective) established as genuine
Source: WordNet® 3.1
Verb
attested
simple past tense and past participle of attest
Adjective
attested (comparative more attested, superlative most attested)
Proven; shown to be true with evidence
Supported with testimony
Certified as good, correct, or pure
(linguistics) Of words or languages, proven to have existed by records.
Source: Wiktionary
ATTEST
At"test", v. t. [imp. & p. p. Attested; p. pr. & vb. n. Attesting.]
Etym: [L. attestari; ad + testari to bear witness: cf. F. attester.]
1. To bear witness to; to certify; to affirm to be true or genuine;
as, to attest the truth of a writing, a copy of record.
Facts . . . attested by particular pagan authors. Addison.
2. To give proof of; to manifest; as, the ruins of Palmyra attest its
ancient magnificence.
3. To call to witness; to invoke. [Archaic]
The sacred streams which Heaven's imperial state Attests in oaths,
and fears to violate. Dryden.
At*test", n.
Definition: Witness; testimony; attestation. [R.]
The attest of eyes and ears. Shak.
Source: Webster’s Unabridged Dictionary 1913 Edition