Is there a tool to verify TIFF files?
Just in case you want checksum validation for long term archiving, (which is what DNG validation does) most of the tools available online just calculate the checksum but I have found a tool that can perform periodic validations, which I'm testing at the moment, called
Fixity.
This tool creates a database of checksum of multiples files in a folder structure which you can check periodically to ensure the data has not been changed. This works well only for archived files, meaning files that will not be updated in the future.
This is not exactly the same as what DNG validation does, as in the latter only the image portion of the DNG file is considered, (the raw data does not change if you edit the DNG)
Just in case, during my preliminary tests, the initial checsum generation for a folder three of 6,482 raw images totalling 260GB, took 2 hours 45 minutes. I'll perform a subsequent validation tomorrow and will report on the elapsed time.
One curious fact, is that the LR database stores a hash of each image file on first import and then another hash at the latest synchronization, which could be used for this validation with little programming effor, but I guess is not a priority.