bear witness to
• serve as evidence or proof that something exists or is the case.
• "little is left to bear witness to the past greatness of the city"
Similar:
testify to,
be evidence/proof of,
attest to,
confirm,
evidence,
prove,
vouch for,
demonstrate,
show,
establish,
indicate,
reveal,
bespeak,
corroborate,
verify,
substantiate,
bear out,
be a monument to,