Could instruction sets be considered an API? Seeing as APIs are considered to not be copyrightable [0], but their implementations are, if an instruction set is

Could instruction sets be considered an API? Seeing as APIs are considered to not be copyrightable [0], but their implementations are, if an instruction set is an API they would be outside copyright. 0: https://arstechnica.com/tech-policy/2021/04/how-the-supreme-court-saved-the-software-industry-from-api-copyrights/ https://arstechnica.com/tech-policy/2021/04/how-the-supreme-...