The phrase 'ascertaining the authenticity' is correct and can be used in written English.
It is used when someone is trying to figure out whether something is true or not. For example, "The detective was tasked with ascertaining the authenticity of the document before submitting it to the court."
The court, to ascertain the authenticity of BlackBerry messages sent between Mr. Ijaz and Mr. Haqqani, asked the attorney general, Foreign Ministry and the Pakistani High Commissioner in Canada to approach Research In Motion, the Canadian mobile device company.
It is not possible to ascertain the authenticity of each YouTube posting, but the fact that the rebels believe that posting them can be useful to their cause is an indication of the overall bestiality of the Syrian situation and also of its effects in Lebanon.
To ascertain the authenticity of the strain, MIP was tested for the presence of unique nucleotide substitutions reported for its hsp65 gene [10].
A PCR negative control was set up for all the PCR batches to ascertain the authenticity of PCR.
As human DNA is a very common contaminant in fossils and laboratory experiments, this makes it particularly challenging to ascertain the authenticity of Neandertal DNA sequences.
There is need to scientifically ascertain the authenticity of the claimed antidiarrhoeal properties of these plants and perhaps develop more readily available alternatives in the treatment of diarrhoea.
The purpose and objectives of the parent studies were discussed with the investigator (OOT) prior to the commencement of data collection to help ascertain the authenticity of the response of the respondents due to the generic nature of the data collection instruments.
'The exercise of ascertaining the facts was a serious one".
The constructs were sequenced to ascertain the right orientation and authenticity in the vector.
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