Originally Posted by Taledin

First off, the bloodline of the hero isn't nessacary. It is the bloodline of the Hylian Knights. (refrence to ALttP)

Second, the mark of the royal family (aka the triforce) appears on the back of the hand of the hero (reference AoL)

Third, the sages of OoT are shown leaving the chamber of sages in the end, and they obviously seem to remember eachother. Thereby the could recall the events. Zelda aswell. Thereby they could speak of the tale which. Then after TP, when the HoT is legend, and the sage's stories linger on, the basement MS chamber is made, with the images as seen.

Fourth, it was only when tHoT was an adult that he had the Triforce. Reason being, he gets it when he goes to the future, thereby it hasn't happened in the past. So when he is in the past, he does not have it. Also, when Ganon is in the past, he has no means of getting to the sacred realm. (and is sealed outside of time in the gap between realms after the final battle in OoT). Thereby Link, without the Triforce, since he is in the past, goes on his journey to look for Navi. This leads to MM.

I think that helps linearist for now. (I trump your trump card)