Auroracoin (AUR) is a peer-to-peer cryptocurrency launched on January 24, 2014 as an Icelandic alternative to bitcoin and the Icelandic króna. The unknown creator or creators used the pseudonym Baldur Friggjar Óðinsson and allocated (premined) half of the 21 million total coins for the 330,000 Icelandic citizens living in Iceland.

This first-of-its-kind national ID enforced airdrop began with Phase I on March 25, 2014 with 31.8 auroracoins per claimant.  Phases II / III concluded in 2015 with 318 / 636 auroracoins respectively per claimant.

Of these 10.5 million premined coins, approximately 40% of the coins were claimed, 10% of the coins were gifted to the Auroracoin Foundation (M1 fund), and 50% of the premined coins were verifiably destroyed.  (AURburnAURburnAURburnAURburn7eS4Rf)   

In 2016 there was a hard-fork to a multi-algorithm(PoW) code change.  There was also a block-time change from 10 minutes to 61 seconds, a corresponding change in block-reward, resulting in a “halvening schedule” change and increase of maximum coins to 23.3 million. ( Adjusted to 17.97 million after 5.345 million burned ) 

In 2018 it was decided to liquidate 80% of the M1 fund to launch the Icelandic Blockchain Foundation (Rafmyntaráð) expanding Auroracoin’s blockchain advocacy efforts within Iceland.

In 2021 Auroracoin released another significant major release and continues to be volunteer-driven using open-source technology with the goal of offering an alternative to inflationary fiat currencies.

Auroracoin

Peercoin, also known as PPC or Peer-to-Peer Coin, was created by Sunny King and his team and launched in August 2012. It is the first blockchain to implement Proof-of-Stake consensus.

The primary inspiration behind the creation of Peercoin was to address a number of perceived shortcomings of Bitcoin, including energy efficiency, security and sustainability, decentralization and long-term viability.

Essentially it was designed as an enhanced replacement for Bitcoin. As such, it was originally forked from Bitcoin and uses the same UTXO style blockchain. However, Peercoin's code was modified to introduce Proof-of-Stake as its primary consensus protocol. The next section explains how this makes for a better blockchain.

Given that Peercoin uses most of the same code, it can easily port new features from Bitcoin and utilize any of the supporting infrastructure, including tech advancements like Taproot or Lightning Network. Peercoin is the only Proof-of-Stake blockchain that uses modern Bitcoin code, making it the perfect drop-in replacement.

Peercoin also has a dedicated community, is actively developed, fairly distributed, has low barriers of participation, can do everything that Bitcoin does, minus the 13 TWh of energy usage, and it's not a scam.

Peercoin

HoboNickels

WorldCoin WDC

ABCC Token

Pascal

CoinClaim

TranslateMe Network Token

Zurcoin

BoutsPro

HyperCash

Francs

Vertcoin

Litecoin Cash

AvatarCoin

Krosscoin

Tronipay

CyberVein's big-data solution is based on the PISR (private, interlink, secure, robust) distributed database, database operations are stored on CyberVein blockchain network which runs on a Proof-of-Contribution (PoC) consensus mechanism. The solution is focusing on enterprise-level "blockchain + big-data" customized services.

CVT is the native utility token that is used for:

Storage payment: The data owner pays the corresponding storage fee based on the file size and bandwidth consumed in such a process.

Computing power payment: Payments from user to owner for usage, and remuneration for software developers is going to be exclusively conducted in CVT.

Data exchange: On CyberVein's federated learning platform, the data acquirer trades the data at a price contracted between the two parties for distributed modeling applications.

CROSS NFT issuance payment: Dapp businesses are obligated to pay for Storage and Data Exchange in light of network resources occupied, and may set up CyberVein token as a means of payment to issue NFT or conduct business in accordance to their desired business model.

CyberVein tools include:

PISR Consortium database, creates better data management: through safe and reliable virtual machine operation and maintenance of user data, data is efficiently aggregated for upstream data, and data traceability and tracking are realized to ensure the reliability of data sources and outputs, and achieve cross-level, cross-departmental data sharing to improve the timeliness, diversity, stock and density of data to realize the commercial value of data, and truly solve the problems in data flow.

DAG storage chain, creates safer data storage, with better efficiency, no block confirmation, low transaction fees, and also eliminates miner, supports asynchronous verification and parallel processing of each node, the more nodes, the faster the speed, the stronger the scalability, which leads to better scalability. The database backup on DAG storage chain provides an extra layer of security for businesses.

Cytrix, allows GPU to be shared. Nodes can contribute part of their GPU to the network, in return for compensation through the Proof of Contribution mechanism. The contributed GPU can aid enterprises or individuals in data modeling with federated learning.

Federated Learning Platform, enables data to be monetized. Federated Learning is a distributed machine learning workflow. The datasets are first trained locally, and the data of all parties is kept locally, without revealing privacy or violating regulations.  Individual terminals return trained models to the server to create a shared model. Effectively protect data privacy and security, solve the problem of information silo, and thus realize the value of data. The platform will also provide algorithms to support data modeling operations by enterprises and individuals.