I know this post was two years and it is still useful even today for those one what wants to learn DID and Ion.

One question is about the DID registration. I use the sample code from https://github.com/decentralized-identity/ion-tools

// Generate and publish create request to an ION node
let createRequest = await did.generateRequest(0);
let anchorResponse = await anchor(createRequest);
console.log(anchorRequest)

in my local, and the execution succeeds. It print did document.

Previously I am capable of query the DID document via the DID URI embeded in the print log. but one day, i am no longer able for this, all are 404.

I also post his question in https://stackoverflow.com/questions/76574466/unable-to-query-did-document-from-register-after-creation

with more information and if you can have tips or suggestion, it would be helpful. Thanks in advance.

Is it possible to generate/order a personal ION ID? If not yet, when might this be possible?

cryptochrome https://github.com/decentralized-identity/ion/blob/master/docs/Q-and-A.md#why-is-bitcoin-chosen-as-the-blockchain

nomofiat 

Not sure why you have to get personal and make baseless assumptions as to me being "new to crypto". We've been discussing this topic in a fairly objective fashion until you popped in. Just for the record, I bought my first Bitcoin in 2013, so I am hardly new. Does that mean I know everything and I am correct all the times? No.

I was not wrong however in my opinion that BTC is not necessarily the most secure blockchain and I have given different arguments to make my point. Here are some more:

1. Bitcoin chain is susceptible to routing attacks, where large ISPs could split the bitcoin network into fragments by hijacking BGP ASes. It also allows for delay and partition attacks. This has been well researched and you can read up on it here, for example:

• https://www.researchgate.net/publication/303488853_Hijacking_Bitcoin_Large-scale_Network_Attacks_on_Cryptocurrencies
• https://btc-hijack.ethz.ch/

2. Furthermore, we have numerous successful double-spend attacks on record, the last one documented in 2019 (read the “Unconfirmed Transaction Attacks" paragraph:

https://www.gemini.com/cryptopedia/double-spend-attacks-bitcoin

Does any of this mean I don't like Bitcoin? No, to the absolute contrary (it's by far the largest position in my portfolio). So there is no need to get all defensive just because I have a slightly less rose tinted opinion about its security.

Yes, Etherrum has its issues too, nobody is denying that. They are being worked on as we speak. 

And I repeat myself again: I am not really interested in hearing Bitcoin maximalist's rose tinted opinions on how their favorite crypto is the best in the world (we can discuss this for hours without coming to a conclusion). I wanted to hear - from Microsoft - why they chose Bitcoin over something else. No one here but Microsoft can answer that. All you can do is make assumptions, and I am not interested in those. 

cryptochrome 

Bitcoin isn't perfect. decentralisation and security are probabilistic so we will never reach 100%

Nothing comes closer to 100% then bitcoin though. Your arguments have been debunked many times but they seem to keep popping back up whenever a bull market attracts new people (and scammers looking to profit of them via altcoins).  https://jimmysong.medium.com/debunking-the-empty-block-attack-10513858b3f8?postPublishedType=initial

Now for ethereum, all you have to do is look at the weakest link: the full archival node! 

There are ca. 4 left. Infura is the most important full archival node operator. When they went down, ethereum went down.

https://cryptobriefing.com/infura-outage-sparks-debate-over-ethereums-decentralization/

It turns out that inflating blocks with massive amounts of data creates irreversible centralisation. Bitcoin developers were ridiculed when they fought to keep the blocks small. Ethereum now proves that they were right.

Bitcoin mining is getting more decentralised so it is being solved. Ethereum's problems look far less likely to be solved.

Timbo155 Ethereum is not PoS. It will be PoS when ETH2 launches in about 18-24 months. Right now, it's PoW, just like Bitcoin. 

As for the 51% attack, I am not saying they will do it (they would be crazy), I am saying they could do it. What do we know of those 5 chinese companie that already control 49% of the global hashrate? Very little. But we do know that China is an adversary of the US. I don't want to sound the conspiracy theory alarm bells, but anyone ignoring this is pretty naive. That about 15% more of the hash rate is also concentrated in China and another 15% in Iran and Kasahkstan doesn't make this any better. That's 80% of Bitcoin's global hash rate in the hands of countries that the US is in trade wars with, sanctions, etc. 

But as I said earlier, we can discuss the details of which chain is better or more secure until we fall off our chairs (like so many others already did before us). The point is: Microsoft did not state anywhere why they chose Bitcoin over any other chain. I was just curious about the reason (and I don't think it has anything to do with BTC allegedly but not evidently being the most secure chain). 

cryptochrome 

Sorry, but you´re not right! A 51% attack isn´t so easy and it is much to expensive. Why should a miner do this? To kill his own business? To destroy Bitcoin? (The mining e.g. in China was forbidden, but the miners were still mining!)  A 51% Attack is puplished within seconds (because everyone can follow the network from everywhere)  and in this (impossible) case the honest users and miners can react (fork!)!

Bitcoin is the safest, decentraliced P2P Network (no central Identities) in the world and Microsoft says this in its ION-paper... Ethereum  isn´t as safe, because it´s Proof of Stake and in PoS, the identities can manipulate the chain- because they are IDENTITIES! 

Sorry, that´s reality 😉

cryptochrome 

They said bitcoin first is better. It is a good choice because this will help all bitcoin codes fork blockchains to test ION.  and there will be second, third...too.

I think ION is as same as ElectrumX, any blockchain or distributed ledgers could use ION to create DIDs. 

---

Sidetree is a protocol for creating scalable Decentralized Identifier networks that can run atop any existing decentralized anchoring system (e.g. Bitcoin, Ethereum, distributed ledgers, witness-based approaches) and be as open, public, and permissionless as the underlying anchoring systems they utilize. 

---

JayOkocha 

Sorry friend, but you are pretty misinformed. 

BTC mining operations are extremely concentrated with mining companies, just as I said. Yes, there are large pools, but the majority of the hashrate is coming from just 5 companies, all of which are in China. They control 49% of the global hashrate. China overall controls 65% of the global hashrate. The remaining 35% are mainly spread across the US, Russia and Kazahkstan, as well as Iran. Some of those 35% are pools, not all of it. 

https://www.statista.com/statistics/1200477/bitcoin-mining-by-country/

https://www.bloomberg.com/news/articles/2020-01-31/bitcoin-s-network-operations-are-controlled-by-five-companies

It has become a real problem. 

PoS may lead to concentration in some cases, but it is not the case with Ethereum, which the statistics for the ETH2 Beacon Chain clearly show. There are literally thousands of decentralized pools to create validator nodes, and unlike ETH's mining operation, which suffers the exact same issue as BTC (concentration, primarily China), the ETH2 validator pools on the beacon chain are very decentralized. 

We can argue over the details all day long, and I am sure we will each find correct arguments. But saying that Bitcoin is way more secure than other chains is an outdated myth. Bitcoiners, especially the maximalist types, need to finally open their eyes. 

cryptochromeYou are wrong. Ethereum is by no means more secure than Bitcoin. To answer your false claims:

1. Bitcoin mining is in the hands of a few major mining POOLS (not corporations in a classical sense), which also thanks to Stratum V2 do not have power over their participants

2. Bitcoins security is not only based on the miners but on the nodes as well (good luck setting up an Ethereum-full (archive) node

3. PoS will lead to more centralization, which many studies and current live PoS projects clearly show

Further why Bitcoin is way more secure than Ethereum:

1. Bitcoin runs for 10 years with no major exploits (unlike ETH)

2. Bitcoin doesn't have a person with big influence over the network (no Vitalik)

3. Bitcoin allows running a full node for 100$

Microsoft knows what they are doing!