Quote from: MusaMohamed on Today at 07:28:01 AM

I tried searching and found most of websites that requires an account to use their forensic blockchain analysis. Two websites I can share, free to use, no sign in.
Four tabs: Address, Inflow, Outflow, Money flow: https://explorer.bitquery.io/bitcoin/address
https://explorer.crystalblockchain.com with two features: Transaction history (need a Demo account to use Connections, Mentions tabs); Visualization (free to use)
https://explorer.crystalblockchain.com/address/
https://explorer.crystalblockchain.com/visualization/new/
Copy and paste an address at the end of url links to use.

Great list, I'll chech out each one when I've some more time.

Quote from: MusaMohamed on Today at 07:28:01 AM

With an account to use but I know you don't like them.
https://www.coinfirm.com/products/blockchain-investigations/
https://www.elliptic.co/solutions/crypto-wallet-screening
https://ciphertrace.com/
https://www.trmlabs.com/products/transaction-monitoring
https://uppsalasecurity.com/trackingsvc/

Yes, account requirement is very unforttunate and some even seem to be very hard to access (pay?) but it's still great to have a list from various sites.
+1

Quote from: o_e_l_e_o on Today at 08:52:13 AM

Quote from: 1miau on October 01, 2023, 07:25:49 PM

For example, he wanted to purchase Bitcoin P2P from a seller but he didn't know where the Bitcoin comes from and if the seller lies to him.

I don't see how using block explorer websites is going to help here.

Yes, a simple Blockexplorer doesn't help much here, especially for Newbies.
That's why I'm searching a site like oxt.me (or even better), where also a Newbie can make a check.

Quote from: o_e_l_e_o on Today at 08:52:13 AM

Is he going to ask the seller to identify the specific UTXOs they are going to trade with prior to the trade?

He was just planning to look if it's a legit seller or if the seller lied to him.
Because if the seller lied, it's a big red flag.

Quote from: o_e_l_e_o on Today at 08:52:13 AM

And then what happens if the seller uses other UTXOs instead?

That's no issue because from what I've read, the buyer was going to request which UTXO's are for sale, the seller sends his address, where the BTC is coming from and then, he (the buyer) could check on his own if he want to make a purchase or not.
By doing so, he would ask the buyer, where the BTC is from. Then, the seller tells him and the buyer could look up (by receiving the puclic address), if the seller has lied to him (by verifying it on the Blockchain).
It's a great strategy in my opinion because if the seller is not a legitimate one or has something to hide, the buyer could catch him lying and avoid him for a deal.

Quote from: o_e_l_e_o on Today at 08:52:13 AM

He's not going to be able to reverse the trade because he doesn't like where those UTXOs come from.

If he's getting other BTC than previously agreed to, then he could refuse to pay.
Of course, all details need to be agreed in advance.

Quote from: MusaMohamed on Today at 07:28:01 AM

The solution to your friend's problem is not to start attempting to investigate specific UTXOs before he has even bought them. The solution is to identify why he wants to do this and which services he is using which are placing artificial and arbitrary restrictions on his coins, and find and use alternatives instead. Alternatively, everything he buys P2P goes straight in to Whirlpool or JoinMarket to completely obfuscate its history.

Investigating UTXOs is in his best interest and I definitely trust him (the buyer), that he's not a criminal.
He seemed very legitimate.
Of course I've not asked him what he's planning to do with his purchased Bitcoin, as it's not really my business.
He seemed legitimate and just wanted to make sure that he's not getting ripped off by a Darknet dealer.

Quote from: Synchronice on Today at 09:57:38 AM

Seriously, since when do we have to investigate the past of our coins/money? Should I buy a dog and hire a dog trainer to check absolutely every banknote that I receive, whether does it has traces of cocaine or not?

Well, cash is not based on a public Blockchain. Cheesy

That's a big difference and we all know these shady Darknet criminals who are trying to rip off unexperienced people with any sort of bullshit. Trying to get rid of stolen or hacked coins is definitely an issue and Newbies are an easy target. Unfortunately, P2P is very affected by shady actors and that's really sad because P2P is very important in my opinion.

Quote from: Synchronice on Today at 09:57:38 AM

To be honest, paid blockchain analyses have serious problems too and they don't function properly.

After all, I believe that these sites should be accessible to anyone because such information is public anyways. It's just a cash grab.
Hopefully, some sites will remove their access restrictions and then, the remaining, restricted sites can see how it goes... Roll Eyes

It's like paying for a Blockexplorer, 100% bullshit.

Quote from: Synchronice on Today at 09:57:38 AM

By the way, if you type wallet address on Blockchain.com, you'll see that some of them are tagged with a name, i.e. wallet X belongs to Mt. Gox.

Yeah, I hope this will get more common for known exchange addresses. When someone claims "hey my BTC is from Binance", we could easily check it ourselves.