BlackOps Market publishes several v3 hidden-service endpoints. They all resolve to the same back-end and any of them is the right one to use. The operator keeps more than one running at a time so that pressure on a single onion does not take the site off the network.
- 01 blackops5l63qnwnmlnsfvtlu66md3x3vp3fdtpna42eq7ozujr67hid.onion
- 02 blackops6kignp3eddmvqcfkjzf6qr6haxbmkypc2xtqlnhuu4ak4dqd.onion
- 03 blackops27m32abqvbhnyswgazqawxqbznbzkkkv5sjo7gve2ndpsdad.onion
Each of those is a 56-character v3 fingerprint. Before you type a password, check the full string against the operator PGP-signed announcement on Dread. The first characters are a chosen vanity prefix, and phishers generate strings that match the prefix and randomise the rest, so a matching prefix is not a match.
Why more than one onion?
A single hidden service is cheap to flood. Publishing several lets traffic move between them with no change on your side. If one address starts acting up, paste another from the list above into Tor Browser and keep going, same account and same balance.