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How to register 300 Tang Poems on blockchain by JS script

Table of Contents

We will go through the steps how to register large amount of ISCN records in one go in this article. You better have a bit technical background to understand the full procedure, but you can still complete the task step-by-step even you don’t. The procedure is easier than filling in a government’s form.

Before you start

  1. Choose a tool for editing CSV file. Free Google spreadsheet is recommended. Prepare the data to be registered in CSV format.
  2. A Mac or Linux computer as we are going to demonstrate on a Mac console. The computer should have node.js and git installed, the latter is optional. The operation in Windows should be more or less the same.
  3. A wallet with small amount of LikeCoin. Keplr is recommended as you will need the seed words of the wallet for one of the steps. ISCN registration costs LikeCoin and that’s really a steal at the moment. Try it out before the price rises.

Step 1: Prepare your data

This step does not require technical background, but it is time-consuming. Below is an example of the 300 Tang Poems data file.

How to register 300 Tang Poems on blockchain by JS script

The ISCN spec recommends fields defined according to CreativeWork type in Most raw data’s fields do not comply to this standard in the first place. We are going to change the column headers in the CSV file to comply with the standard.

Here is my tuned version (original fields > CreativeWork fields):

  • ID > identifier
  • author > author
  • title > name
  • genre > genre
  • poem text > text
  • web link > url
  • license > usageinfo

Note that the following two columns are not defined in CreativeWork fields, but needed by the iscn-batch-uploader tool. We will look into the tool later.

The two fields:

  • ipfsHash: iscn-batch-uploader tool treat this field as the “Content Fingerprints” of ISCN record.
  • type: it’s the type defined in, e.g.: Creative Work, Book, Game, Painting, Article, Photograph, Episode, etc. iscn-batch-uploader treat all record as “CreativeWork” type by default if this field is not specified in the CSV file.

Blockchain transaction is expensive so it is not cost-effective to store large data file, but storing smaller content such as poem text seems reasonable. For demonstration purpose, however, I will put the poem text to a separate txt file as well and upload them to Pinata IPFS service so that I can have an IPFS hash for ISCN content fingerprint for each record. iscn-batch-uploader does not support Arweave link as content fingerprint at the moment, expect to have this feature in the near future.

You will need a batch uploading tool for IPFS batch uploading and pinning. I am afraid that this feature is not catered by iscn-batch-uploader. You may have to use the Pinata GUI to upload the files one-by-one and then copy the hash to the CSV file if you are not a programmer. The IPFS upload process is tedious and not suitable for processing large amount of data. I will suggest you to complete the IPFS task later with better tool, as you can upload all the metadata in the CSV file for ISCN. You can always update the registered ISCN records, say, filling up the IPFS hashes as content fingerprints, to new versions later.

If you know coding, however, you may try my python tool for Pinata. Welcome for pull requests.

Our example of Tang Poems contains 300 records only. You may prepare much larger amount of data in the same way, however. Feel free to commit all verses of “The Bible”, Shakespeare’s scripts, all of your blogs, music scores, newspaper archives, or minutes of public authorities to the LikeCoin chain. There is a lot of work to do for those without any technical background.

Step 2: Install iscn-batch-uploader

git clone

If you have git installed in your computer, you just need to run the above command in your terminal, under your selected working directory, to download iscn-batch-uploader. If you do not have git ready, you can download the program zip file from GitHub directly (click the green “Code” button on the top right corner), uncompress the file to get the program directory.

How to register 300 Tang Poems on blockchain by JS script
download iscn-batch-uploader from GitHub

cd to the program directory in your terminal, type the following command to install the program:

npm install

Step 3: Edit the config file

There is a “config.js” file under the “config” directory of the program directory. Edit it with any text editor tool, modify the line config.COSMOS_MNEMONIC and fill in the seed phrase of your LikeCoin wallet, for example:

config.COSMOS_MNEMONIC = ‘paint man cloud google winnie pool think hell imposition police illegal tyranny’;

Step 4: Copy CSV data file to the working directory

Copy the CSV data file that you want to register ISCN, in our demo “TangPoem300.csv”, to the iscn-batch-uploader directory.

How to register 300 Tang Poems on blockchain by JS script

Step 5: Execute the uploader command

The installation is ready. After confirming iscn-batch-uploader as the current directory and execute the following command:

node index.js [your csv filename]

[your csv filename] is your data file name, hence in our example it is:

node index.js TangPoems300.csv
How to register 300 Tang Poems on blockchain by JS script

Registering 300+ ISCN records costs less than 1 LIKE?! It’s a real good deal. Try it out now.

Step 6: Verify on blockchain

A new file “output.csv” will be generated after you execute the command successfully. Two more columns are added to the new CSV when comparing with the original data file: txHash and iscnId.

txHash is the transaction hash on LikeCoin chain. You can search the tx hash by supported block explorer such as Big Dipper, e.g. try this tx hash:


Toggle the “Raw” option to view the details of the registered ISCN information.

The iscnId is the unique content ID supported by the LikeCoin chain. You can check the ID up in For example, try searching for


in to view the poem registry.

How to register 300 Tang Poems on blockchain by JS script
ISCN ID iscn://likecoin-chain/gYfyLhuE941XFQFW_YMGnoxvx2nB3Y_CBdqreCUmyKo/1

You can check all the registered ISCN records in Login (by Keplr) with the wallet that you have filled the seed words into the config file of iscn-batch-uploader, click “Your Publishing” and check your registration. Only the first 100 records can be displayed in however.

How to register 300 Tang Poems on blockchain by JS script

Advance: Updating ISCN versions

iscn-batch-uploader supports updating metadata versions:

  • Prepare the data that need to be updated in the CSV file. Entire set of field values are needed, the ISCN record will be overwritten by the rows in the data file except the iscnId.
  • Run the command index.js again, with the parameter “update”, syntax:
node index.js TangPoems300A.csv --update

When the script reads records that with iscnId ready, it will update the record with the new version of metadata, but not registering a new ISCN. The last digit after the backslash reflects the version number, e.g. /1 represents version 1, and /2 represents version 2. get the most updated version of ISCN records by default if no version number is given.

Issue: what to do if registration fail?

iscn-batch-uploader fails to register particular ISCN records occasionally for unknown reason. The program retries 1 time upon failure, and will skip to next record if retry fail. You need to inspect the details of output.csv for any records that misses iscnId and txHash.

The best way to amend the missed records is to re-run index.js with the renamed output.csv as the input file parameter. e.g.:

node index.js fromOutputFile.csv

The script will skip those records that already have iscnId, you the “update” parameter is not given upon execution.

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