Let's speculate on certain sounds and samples.

[Group Hex]

Mark Pritchard & Thom Yorke - “Gangsters” contains what sounds like a sample of the bass line in BOC’s “Aquarius”.

Great tune itself, as well. Have a listen and see if you hear what I’m referencing.

[NineRubberCops]

I'm very tempted to trawl through episodes of Blockbusters just to find the specific episodes they sampled in "Blockbusters" but:

A) Not every episode is readily available on the internet, and
B) There are over 1,000 episodes of Blockbusters, each over 30 minutes in length.

This isn't worth it, is it

Edit: I just did the math, that's roughly 20 days.

[Negamuse]

I actually did do a search on an archive once, can't remember what I was using to narrow it down but probably the contestant names? Didn't find it. But that's not to say it can't be found, I either missed something or it wasn't listed on the particular archive I was looking at

[The Dookster]

I was showing some BoC tracks to my brother not long ago and he pointed out a similarity to another song.

Seven Forty Seven (timestamped to 1:18): https://youtu.be/oJw3pCeGR6U?si=HxMHkYKaKiQlAlbu&t=78

Katz Theme from Courage the Cowardly dog (timestamped to 0:43): https://youtu.be/oY2KnW19Tls?si=zZr6HSgkpbSyV8Kn&t=43

I don't think it's the exact sample source, but they might be the same hi-hat loop sample.

[cursivel]

Not really about the samples, but in Hey Saturday Sun, when played backwards, the electric piano lead has a cadence that sounds a lot like pronouncing the words "hey saturday sun".

Maybe it's just a coincidence, but hear for yourself: https://youtu.be/K1OH4SP-WAM?t=96