in the 1600s, King Macbeth has succeeded in taking the throne of his country for himself with the help of a cabal of dark witches. Due to their art of divination and prophesizing, he has managed to stay one step ahead of his rivals, ruthlessly purging them in order to establish his authoritarian regime. However, despite the power that he has gained, he retains an insecure grip on power. The witches have told him of a prophecy that sees the end of his reign by the actions of an individual. This chosen one would be born under a total solar eclipse, in which an entity will enter and possess the body of a newborn child. This chosen one will grow up to lead a rebellion and end his tyrannical reign. Although the witches can predict when a solar eclipse will occur, they cannot pinpoint the exact child whom the entity will choose, nor the location that it will happen. Macbeth must find a way to relay the coming of the messiah for as long as possible to extend his rule over the populace. Finding and killing the child become's Macbeth's first priority. However, the prophecy goes on to say that the messiah can never truly die, but will simply be reincarnated during the next solar eclipse.
Therefore, Macbeth settles on the idea of a database that would be standardized across the kingdom. This would require strict record keeping, demanding that the records of every child born during an eclipse within the kingdom be gathered for use in a nationwide registry. These records would need to be specific, down to the very date and time the child was delivered. The goal is to design a system of record keeping that would allow for a national database that is as accurate as possible. This can be done by mandating that hospitals keep records specific to the event and requiring them to be turned over to the state. Once they had been gathered, the king's staff would analyze the records and narrow down the potential list of chosen ones to a handful few.
There is precedent for this in many governments in the form of a census, which are used to determine the number of people there are in a specific area. They do this to determine the amount of taxes they can expect, or to decide how much resources to devote to a certain location. However, there are a number of problems with this format. Going on a murderous rampage and killing every child delivered on a certain day is simply impractical for the long term. Collecting birth records for certain children linked to a specific event is likely to raise suspicions. People are unlikely to cooperate with having their data collected by the state, specifically if it can get their child potentially killed. Many expecting mothers would simply avoid hospitals and have their children in secret away from prying eyes, or at home. In a worst-case scenario, these scorched earth tactics are likely to push the populace into open rebellion and civil war. This leads to a high body count that limits to pool of taxpayers in the future.
Macbeth needs to disguise his motives for collecting records in creating this national database for the purpose of murdering newborn chosen ones, all while protecting his good guy PR image. How can the king accomplish this?