Stamp an Object
The vBase Stamper records a file’s timestamp, author, and digital fingerprint (SHA3 hash) on a public blockchain. This metadata—known as provenance—provides permanent, verifiable proof of a file’s authenticity and timestamp.
How to Make a Stamp
For a quick overview, 🎥 Watch the How-to Video
Step-by-Step Instructions
Visit the vBase App
Sign in or register for a free account
Go to the Stamper page: app.vbase.com/stamp
Click “Browse for File” and select your file
(Optional) Check the box if the file belongs to a Collection
(Optional) Select or create the relevant Collection
Click “Make a Stamp”
What Happens When You Stamp a File
When you click “Make a Stamp”, the following process occurs:
Your file’s SHA3 hash (also called the content ID) is calculated locally in your browser
This hash is published to a public blockchain, where it’s permanently recorded
A timestamp is returned, reflecting when the blockchain included your content ID
This becomes an independently verifiable record of your file’s existence and integrity
The following data is recorded to the blockchain:
Blockchain Address: Your vBase account’s public blockchain address
Content ID: The file’s SHA3 hash, serving as its unique digital fingerprint
Collection ID (if applicable): The identifier of the Collection the file belongs to
Example of a vBase Stamp
Blockchain Address:
0x0bf1504fB66c716161A8bc60906eC38792eA2000Content ID:
0x49adefb456c981ec67ab09b2b301b22a434922456169244e1f3b7e51d9fe54eeCollection ID:
0x9c22ff5f21f0b81b113e63f7db6da94fedef11b2119b4088b89664fb9a3cb658Timestamp:
2023-08-08 21:34:00+00:00
Note: vBase does not publish or share your actual file, filename, or personal information on-chain. Only cryptographic identifiers are recorded to preserve privacy and ensure long-term verifiability.
What Is a Collection?
A Collection groups related files—such as portfolios, observations, documents, data points, or project files—under a single identifier. When a file is stamped with a Collection, the blockchain record reflects that relationship, and this relationship itself becomes verifiable.
Why Use Collections?
📦 Dataset Integrity: Prove a file was part of a specific group (e.g. a portfolio belongs to a particular strategy, or an observation belongs to a particular experiment)
✅ Collection Verification: Validate the completeness of a Collection. Using Collection stamping, you can assure a verifier that they're seeing all the data associated with a particular Collection, and no extra or missing data.
🧩 Better Organization: Track provenance across a project, experiment, strategy, or dataset
📌 Tip: Collections are optional. Files not in a collection are still independently verifiable.
File Backups and Data Integrity
By default, vBase saves a secure backup of your file to help prevent data loss. You can enable or disable this setting in your Account Settings under your profile.
Important: If backups are disabled, be sure to store your file safely. If the file is lost or changed, its provenance can no longer be verified.
Quick FAQs
Can a Stamp Be Revoked?
No. Blockchain stamps are permanent and immutable. You can stamp a new version of a file, but existing stamps cannot be changed or deleted.
How Do I Verify a Stamped File Later?
You’ll need the original file and access to the blockchain record. Follow the guide here: How to Verify a Stamped File
Additional Notes
Your file’s content ID (aka hash) is calculated locally in your browser. If backup is disabled, your file is never uploaded or seen by vBase
🔗 View a sample stamp on Polygonscan
Stamps are stored on the Polygon blockchain and can be independently verified using tools like Dune Analytics or by querying Polygon nodes directly
🔒 SHA3 is a widely trusted cryptographic standard used in banking, telecom, and secure systems
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