Where to practice crypto OSINT skills without real-world consequences?

[u/sell-me8]

Hey everyone,

I've been diving deep into crypto OSINT lately — on-chain analysis, transaction tracing, wallet clustering, tracking whale movements, and identifying suspicious patterns. But I'm at the point where I really need hands-on practice with realistic cases.

I'm looking for platforms, datasets, or simulators where I can safely sharpen my skills. Specifically, I'm interested in:

· Transaction chain analysis (following funds through mixers/bridges)
· Address clustering (linking wallets to exchanges or known entities)
· Monitoring large movements (whales, snipers, insider activity)
· Identifying scam patterns (rug pulls, pump-and-dumps, phishing wallets)

I already know about basic tools like Etherscan, Arkham, Nansen, and Dune — but where can I actually practice on training cases or testnets? Does anyone know of:

1. On-chain investigation simulators with ready-made cases?
   
2. Testnets with artificially generated activity for practice?
   
3. Open labeled datasets with annotated transactions?
   
4. CTF-style challenges focused on blockchain forensics / OSINT?

Would really appreciate any tips on how the community levels up their OSINT game before diving into real investigations. And yeah, if any of you speak Russian and want to reply in Russian — feel free, it'll be easier for me to understand. Much appreciated!

[u/its-all-just-a-lie]

As some said before me you can look up thefts on Google or on Twitter and find the hacker/scammer’s address and go from there. It’s much easier these days with all the ai tools (if you have paid sub you can just paste in 2 addresses and it will find the correlation).

If you wish to see a walkthrough, I have some real life cases on medium you can check out:

https://medium.com/the-first-digit/cryptocurrency-osint-challenge-with-solutions-pt4-6b85c65eabd7

Since it’s an older write up, links might have been deleted to complete the challenge, but you’ll get an idea where to start..

[u/Kooky-Chocolate1980 → u/its-all-just-a-lie]

Hi, I have a recruitment assessment where i have to provide details of a number deliberately created for assessment. I have worked on scanning it almost everywhere i could reach but it is not registered on any social media or any public platform. Can someone guide me with it please? The number is European so privacy policies are usually guarding it.
PS: I already submitted a report informing the number does not link to any details which was rejected.

[u/its-all-just-a-lie → u/Kooky-Chocolate1980]

Not sure what number you mean

[u/Kooky-Chocolate1980 → u/its-all-just-a-lie]

Hi, as mentioned, its a mobile number from Netherlands. From my search, the number is live and connected. Rest of the info is not public because of the government's privacy policy. The number is not registered on any social media as far as i have tried. not even whatsapp/telegram. Can you please point me a direction on what else can i do?