"confirmation of origin" is correct and usable in written English.
You can use it when you need to refer to the process of validating that a particular item or person comes from a specific place, source, or origin. For example, "We need confirmation of origin before accepting the shipment of goods."
Mr. Zayat said Dr. Zawahiri wrote or dictated the message for the Web post, although there was no independent confirmation of its origin.
This technique allows positive confirmation of the origin of genes cloned from obligate pathogenic fungi and could be adapted for use on any samples containing mixed fungal species.
Collected samples and potential contaminants should also be investigated both before and after irradiation by ultraviolet rays or electron beam for further confirmation of sample origin.
It is thus evident that remote sensing image and hyperspectral data analysis and investigation of topographic characteristics only form the first step in building a case for confirmation of impact origin either by identifying potential structures or by establishing the context for detailed field analysis.
Cells were characterised on multiple criteria to provide the best confirmation of their origin and purity.
In cases of initial diagnosis of RCC dating back more than 2 years, cytohistological confirmation of RCC origin of the current lesions was mandatory.
The above brief review of recent history highlights that pathogen discovery has been accomplished in very different scenarios, from accidental detection of 'orphan' viruses to the confirmation of bat origin of known diseases using targeted surveillance.
Reasons for exclusion were: absence of invasive cervical cancer (n = 1), sample in which confirmation of cervical origin was not possible (n = 1), CIN I (n = 1), carcinosarcoma (n = 1), endometrial adenocarcinoma (n = 2), cervicitis (n = 1), carcinoma in s itu (n = 11) and sample with normal endocervix and lack of ectocervix (n = 1).
Although closed, outside horses can be registered upon proof of origin, visual inspection and DNA confirmation of parentage.
