Stamp an Object
Last updated
Last updated
The vBase Stamper records a file’s timestamp, author, and digital fingerprint (SHA3 hash) on a public blockchain. This metadata—known as —provides permanent, verifiable proof of a file’s authenticity and timestamp.
For a quick overview,
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Go to the Stamper page:
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”
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 , 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
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.
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.
📦 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.
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.
No. Blockchain stamps are permanent and immutable. You can stamp a new version of a file, but existing stamps cannot be changed or deleted.
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
By default, vBase saves a secure backup of your file to help prevent data loss. You can enable or disable this setting in your under your profile.
You’ll need the original file and access to the blockchain record. Follow the guide here:
on Polygonscan
Stamps are stored on the Polygon blockchain and can be independently verified using tools like or by querying Polygon nodes directly
is a widely trusted cryptographic standard used in banking, telecom, and secure systems