Try the primary node first, because it is the oldest address and usually resolves fastest. If it is slow, rotate to the secondary or reserve. All three resolve to the same market with the same account and balance.
It runs a deep pool of nodes kept warm at once and has fast-responding moderators. When one node is flooded the others stay up and you rotate over, which is why people point to Osiris during DDoS season.
Yes, once verified. Every node in this explorer is part of the PGP-signed Osiris pool. A fallback is not a lesser address that deserves less scrutiny. Verify each one against the login captcha, every session.
Bitcoin and Monero. Use Monero when privacy matters, because it keeps the payment off a readable public ledger. Use Bitcoin when a vendor accepts only Bitcoin. The deposit address is fresh per order.
Copy it from the signed pool on this explorer, then compare it against the address the Osiris login captcha prints. If they match, proceed. If not, close the tab. Never type a fifty-six character onion from memory.
Almost never. A slow node is usually your Tor circuit or a temporary flood raising the queue. Rebuild the circuit and retry, or rotate to another node. If all three stall across circuits for several minutes, check the status log.
No. Osiris is a Tor hidden service reachable only through Tor Browser. Any clearnet page claiming to be the Osiris market is a phishing operation. This explorer is a status reference, not the market.
Standard 2 of 3 multisig. You fund the order, the vendor ships, you confirm receipt, and the coin releases. Finalise-early is locked until a vendor has earned it. See the trading docs.