One NFT can’t hold much. So most projects point to off-chain storage.
Ledger Scrolls
So We Turn One NFT Into a Scroll
One policy. One manifest. Then numbered page NFTs — each carries a chunk. Together they become a complete file.
📦
📜
#1
#2
…
On-Chain Proof
175 Pages + 1 Manifest = 176 NFTs
Real mint screenshot: one policy, one manifest, and 175 numbered pages of MP4 bytes.
Sealed Set
Minted with CNTools. Locked by Time.
Minted under one policy — then time-locked. After lock, the set is permanent.
Reading the Chain
Koios: Decentralized Chain Data, Free to Use
Koios is a community-run API network. Your browser pulls the on-chain pages and reconstructs the file — no key, no paywall.
Stand By
Assembling Video from the Blockchain…
Collecting pages → stitching bytes → building a playable MP4. Stand by.
0/175 pages (+ manifest) · 0%
⚠️
Connection failed
What Just Happened
Your browser reconstructed a complete MP4 video file by reading raw data from 176 NFTs on the Cardano blockchain. No streaming server. No CDN. No IPFS link. The actual binary video data lives permanently in CIP-25 NFT metadata — stitched back together in real-time by your browser.
This is the first video ever stored entirely on any blockchain. It will remain playable for as long as Cardano exists.
176
On-Chain NFTs
—
Video Size
MP4
Format
∞
Lifespan
The Technology
📜 Ledger Scrolls
An open-source standard for storing immutable data on the Cardano blockchain. Documents, images, audio, video — permanently preserved on-chain. A library that cannot burn.
🔗 Koios API
A decentralized, community-run REST API for querying Cardano. No API key. No single point of failure. Multiple independent operators worldwide serve chain data freely.
🧩 CIP-25 Metadata
Cardano's native NFT metadata standard. Each NFT carries hex-encoded video data in its minting transaction — readable by any Cardano tool, forever.
🔐 SHA-256 Verification
Every byte is cryptographically verifiable against an on-chain hash. Trustless data integrity — mathematically provable, no authority needed.
Take It With You
This video was reconstructed from immutable on-chain data. Download a perfect copy — the same bytes that will exist on Cardano forever.
Create Your Own Scroll
Ledger Scrolls is fully open-source. Anyone can mint immutable data on Cardano — documents, images, audio, video. Your data, permanently on-chain, readable by anyone, owned by no one. The tools, templates, and viewers are all free on GitHub.
