You have certifications for food and products but none of them are agnostic. Kosher is jewish certification, halal is an islamic certification, jhatka certification is only for sikhs, then you have certifications and verification by each countries which are limited to a country or a geography. None of these have a reliable reverification of such standards by the consumer or the customer himself.
I propose:
1. Every corner of the kitchen & the cleaning area should have a camera supplied by us which is monitored & controlled only by an AI which streams all the cameras to a streaming service, 1 random camera at a time.
2. Each stream with it's anonymised name will have a bounty on it where users can make money by pointing out misses by the restaurant. These misses then will be used by the restaurants to improve their hygiene system & process. Restaurants with most such misses in a quarter or a year will lose its certificate and can only apply after a year. They have to buy the gear again when they get certified.
3. Such video footage gets auto deleted after 31 days. Clips of misses will be extracted and stored forever to train the AI to identify such misses.
4. optionally, food outlets have to use a light scanner to scan for pesticide recides from the ingredients. This is a very cheap gadget which is based on the fact that different pesticides are visible in different spectrum of light and reflect a specific spectrum of light. Such a PSAI (Pesticide Scanner with Artificial Intelligence) will give more confidence to customers.
This is a one time investment, small CAPEX, minimal fixed OPEX, unlimited market share, no competition (yet).