Have you ever wondered how Shazam works? I asked myself this question a few years ago and I read a research article written by Avery Li-Chun Wang, the confounder of Shazam, to understand the magic behind Shazam. The quick answer is audio fingerprinting, which leads to another question: what is audio fingerprinting?
This article is a summary of the search I did to understand Shazam.

Source: https://jmason.ie/2024/07/09/205901a.html

Journalists watch out—you may be unintentionally revealing sources.

Unlike previous text fingerprinting techniques, zero-width characters are not removed when formatting is removed from text