attested

fe’l verb

1. To affirm to be correct, true, or genuine. When will the appraiser attest the date of the painting?
2. To certify by signature or oath. You must attest your will in order for it to be valid.
3. To supply or be evidence of. Her fine work attested her ability.
4. To certify in an official capacity.

sifat adjective

1. Of words or languages, proven to have existed by records. The word slæpwerig (sleep-weary) is attested in the Exeter Book in the form slæpwerigne.
2. Proven; shown to be true with evidence
3. Supported with testimony
4. Certified as good, correct, or pure