# NFTs on BTC By [taihucao](https://paragraph.com/@taihucao) · 2023-05-15 --- Basic about BTC --------------- Max Supply: 21,000,000 1 BTC = 1 \* 10^8 sat UTXO [https://river.com/learn/bitcoins-utxo-model](https://river.com/learn/bitcoins-utxo-model) Address Types of BTC -------------------- * P2PKH * P2SH * SegWit * P2TR [https://bitcoin.design/guide/glossary/address/](https://bitcoin.design/guide/glossary/address/) ![Segwit](https://storage.googleapis.com/papyrus_images/939660b86167f77169500c9a2e58ae46b32119863eec29dccc128267931ff2f6.png) Segwit NFT = Non-fungible token ------------------------ NFT on Ethereum --------------- ### Type * ERC721 * ERC1155 * etc. ### Metadata * TokenID * Picture, Video, Music, etc. (On-chain or Off-chain) ### Numbers * Infinity ### Technology Base - Smart Contract NFT on BTC ---------- ### Type * Ordinals (One of the NFT solutions only) ### Metadata * Text, Picture, Video, Music, etc. (On-chain) ### Numbers * Limited What is Ordinals? ----------------- Make **every** satoshi non-fungible! _Segwit + Taproot → Ordinals_ [https://docs.ordinals.com/overview.html](https://docs.ordinals.com/overview.html) * satoshis are ordered since mined * satoshis are processed in order for BTC transfer transactions ![](https://storage.googleapis.com/papyrus_images/387b7b7b07e9df49c5be75d5d76b2d7040e63fb9c8402efa011219aafab42d58.png) ![Sat Sample](https://storage.googleapis.com/papyrus_images/38eb5f584f719d0cf66a5a8a9f93fc342f6fab937955becd3450de2a4d2c5b8b.png) Sat Sample ![Degree Represtation](https://storage.googleapis.com/papyrus_images/4dc6206048931564fbd0d3b286e88b074133ca5c5a96f3bc3f248be4eaf51768.png) Degree Represtation * **_Blocks_**: A new block is mined approximately every 10 minutes, from now until the end of time. * **_Difficulty adjustments_**: Every 2016 blocks, or approximately every two weeks, the Bitcoin network responds to changes in hashrate by adjusting the difficulty target which blocks must meet in order to be accepted. * **_Halvings_**: Every 210,000 blocks, or roughly every four years, the amount of new sats created in every block is cut in half. * **_Cycles_**: Every six halvings, something magical happens: the halving and the difficulty adjustment coincide. This is called a conjunction, and the time period between conjunctions a cycle. A conjunction occurs roughly every 24 years. The first conjunction should happen some time in 2032. This gives us the following **rarity levels**: * `common`: Any sat that is not the first sat of its block * `uncommon`: The first sat of each block * `rare`: The first sat of each difficulty adjustment period * `epic`: The first sat of each halving epoch * `legendary`: The first sat of each cycle * `mythic`: The first sat of the genesis block **Rare Sat Supply** * `common`: 2.1 quadrillion * `uncommon`: 6,929,999 * `rare`: 3437 * `epic`: 32 * `legendary`: 5 * `mythic`: 1 What is Inscriptions? --------------------- * Metadata for NFTs on BTC * Text, media, etc. * Store in Taproot script ( size < 4M) How the NFT created on BTC? --------------------------- Create a transfer, involve the target sat, input the inscription you would like to write onto BTC blockchain. ![](https://storage.googleapis.com/papyrus_images/b9300d03fd8b07cddd4ddf5ae8ca49ae01a3917442a822797caa74240d59938f.png) ![](https://storage.googleapis.com/papyrus_images/dade4904a15ba82be7b6e2d6ed0bd3c10a19b066bb9c7e2537ad0f5487a07c03.png) References ---------- [https://www.theblockbeats.info/news/35749%20Inscriptions](https://www.theblockbeats.info/news/35749%20Inscriptions) [https://news.marsbit.co/20230320170428135918.html](https://news.marsbit.co/20230320170428135918.html) --- *Originally published on [taihucao](https://paragraph.com/@taihucao/nfts-on-btc)*