The browser captures assertion bytes only. Core verification happens off this page.
{"allow_credential_ids_b64url":[],"credential_public_key_sec1_hex":"04fd46c153e8fe42c95b728542dadc87b9a21bd8c90b28c33f1cdbd065e2d2bfba44f5fa0da892383567a89553d0ecad6b39f8ad090b5f00ed0b032b0c8efce164","origin":"https://mail.prescium.com","presence_challenge_ref":"e291e272396dff697f53a4107f70ebb2911bbe90f832eeae8630859d0e01e74f","rp_id":"prescium.com"}