# Bitcoin Identity Standards and Applications

![](https://i.imgur.com/q32lAXY.png)

* [Bitnation taps Blockchain tech to aid Refugees](https://www.newsbtc.com/2015/09/09/bitnation-taps-blockchain-tech-to-aid-refugees/)[[**^**](#Bitnation-and-the-United-Nations)]
* [BTCR DID Method](https://w3c-ccg.github.io/didm-btcr/) — The Bitcoin Reference DID method (did:btcr) supports DIDs on the public Bitcoin blockchain. The Bitcoin Reference method has minimal design goals: a DID trust anchor based on the Bitcoin blockchain, updates publicly visible and auditable via Bitcoin transactions, and optionally, additional DID Document information referenced in the transaction OP_RETURN data field. No other Personal Identifiable Information (PII) would be placed on the immutable blockchain.