Hello,
I've been analysing a PDF file and discovered the Original Document ID: uuid:65E6390686CF11DBA6E2D887CEACB407 in several PDFs, Adobe Illustrator, and some JPG image files.
I haven't found any XMP records with an Ancestor block, and initially, I believed that this was the original document ID from which other PDFs were derived. However, upon examining other PDFs with the same original document ID, it seems that they are not from user-generated PDF files. I then considered the possibility that the OriginalDocumentID is linked to specific versions or installations of Adobe Illustrator CC, but I noticed that PDFs and images were generated from different versions of Adobe products. Can you provide any information about this uuid:65E6390686CF11DBA6E2D887CEACB407? When I search for it on Google, I can see some entries in the Google search https://exif.tools/meta/Original-Document-ID/uuid:65E6390686CF11DBA6E2D887CEACB407.
No one can provide any information about a specific uuid other than the person who has the original source document. Even if it had been spread across the net, the uuid isn't metadata that's likely to be indexed outside whatever Digital Asset Management (DAM) program assigned the uuid in the first place.
See Universally unique identifier (Wikipedia) (https://en.wikipedia.org/wiki/Universally_unique_identifier).