No idea what's going on?

Check out the previous puzzles:

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Hint 1: The first 5 letters of the second address are missing two vowels. | Addendum: The words in the addresses direct you to certain parts of the forum.
Hint 2: Where BBCode cannot exist, something else does. Word processors may help. | Addendum: Check for hidden characters.
Hint 3: Perhaps you should look for the reference but in a different format.

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SOLUTION

Step 1: The first post has the contents: [᠎color=#ba58ec][᠎url=https://27ebfGNx4nJQT2dfs3E4mxV3tuytamWeJm86K77pa3SDrzk]. ba58en → Base 58 Encoding on the 273bf... string.

Step 2: Decoding the 27ebf... string leads to the 1NEGtaGs... address which sent the prize to 1shBNg... and on my trust page, I was given a neg tag that included a shebang in it.

Step 3: The text was: "part of the corrupt gang#! with tman laudaM Darkstar hhampuz all 5 collude" with a reference of search. This was by user "dtmorelikeshitty"

Step 4: MD5 hash of "search" is 06a943c59f33a34bb5924aaf72cd2995 and searching for it on-forum leads to this post: (irrelevant parts deleted)


Step 5: I sent a positive trust to Cyrus: "4᠎ real, a ᠎g᠎reat ᠎q᠎uality admin with ᠎Z᠎eal. I'd trust them as a proper Ad᠎j᠎udi᠎cA᠎tor. ᠎6᠎" and the characters 4gqZjcA6 were surrounded by 0-width whitespace characters.

Step 6: The reference was to pastebin, which leads to https://pastebin.com/4gqZjcA6:


Where my profile contains the partial private key 5KVwLpFLnaf2RrDnK9gZRky

Step 7: Searching again for the SHA-256 hash of "search" returns this post: Re: What exactly is Trust Depth?

Step 8: The dtmorelikeshitty profile has the user "QBFD4raRqXMjwBRWqFR1GqyCN" in its trust list.

Step 9: The dtmorelike profile also has "... + DQw" in its profile.

Step 10: Putting all three parts together (5KVwLpFLnaf2RrDnK9gZRkyQBFD4raRqXMjwBRWqFR1GqyCNDQw) leads to the private key.

Done.