Iwer Sonsch | [Savestated] SM64: CCM cabin entry Capless/Cannonless/Coinscoreless (likely viable for blindfolded) @iwersonsch5131 | Uploaded June 2022 | Updated October 2024, 13 minutes ago.
I got this twice in probably around 500 attempts from various blindfolded-viable savestates. This clip would definitely need a much better setup to make it into a CCC*less blindfolded run. I also clipped twice in the roughly 100 attempts before I started holding upright so a much better setup does seem possible.
It would also probably only be useful for the first star, as cheating the Penguin race is hard enough, and the current strat for the ending doesn't get enough speed to jump over the last 15 coins.

This strat appeared in Pablo Acevedo's savestateless (but visual) completions of 77 stars in the Capless Cannonless Coinless challenge (youtu.be/oJl55yBmUqA?t=859 ).
He probably did not actually reset the entire challenge whenever he would accidentally collect a coin, as is common practice with CCCless 70 star runs and the biggest reason why Coinless is so much more ridiculous for Blindfolded than Coinscoreless.

Recently, Bubzia's chat saw the topic of 70 star CCC, and we concluded that it would be ridiculously infeasible if the run forcibly died the instant a coin is touched (Remember that in Blindfolded, you can't see whether you're in a slightly wrong position and about to touch a coin).
In addition, there are only 81 theoretically possible and only 72-77 RTA-viable stars, and the additional restriction of blindfolded gameplay would most likely put the challenge completely off-limits.

So instead, we came up with CCC*, with the C* meaning coinscoreless: Don't save a nonzero coin score, and you must save at 70 stars.
This means that a runner could hear that they accidentally collected a coin and simply exit the course, or they could reset the game if they hear a coin count up after collecting a star.
This variation also unlocks up to 6 red coin stars in side courses (BitDW, BitFS, WC, MC, VC, SA). However, collecting all 8 red coins in TotWC without a wingcap refill seems far off-limits for Blindfolded, and so the variation only adds 5 extra stars in practice.

Here's a spreadsheet estimating how much difficulty the CCC* challenge adds for each star in the game, excluding 100c stars for obvious reasons:
docs.google.com/spreadsheets/d/1lTrJPJ17GJZ632EkAKkusaadCDndw67ubqcTrHl8P6o/edit?usp=sharing