> For the complete documentation index, see [llms.txt](https://docs.v2.like.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.v2.like.co/zh/depub/what-is-iscn.md).

# ISCN

ISCN 全寫 [International Standard Content Number](https://iscn.io/)，是每筆內容在 LikeCoin chain 區塊鏈上註冊的元數據（metadata）。

ISCN  的用途有如書籍出版所用的國際書號 ISBN，把內容出版到 [LikeCoin chain](https://www.mintscan.io/likecoin) 區塊鏈的概念也相似，註冊獨一無二的 ISCN，附帶包括作者、日期、授權方式、內容指紋等元數據。因為區塊鏈的特性，ISCN 和元數據不可篡改。

ISCN 資料結構支援內容版本，每筆 ISCN 記錄均會連結到上一版本的記錄。

註冊 ISCN 需要花費 [LikeCoin](https://like.co/)，最基本用作支付區塊鏈礦工的成本，也會用作支付應用層服務供應者的成本。


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