Stampiz API for Notarization
Stampiz offers an on-demand API service that allows for the integration of blockchain notarization of any digital content in various contexts, ensuring its immutability and verifiability.
Notarization allows you to certify the existence and integrity of digital content by registering its cryptographic hash on public, immutable blockchains.
Using the Stampiz API never involves Stampiz storing the original content; only the hash (SHA-256) of such content is notarized, ensuring:
- Integrity: Any modification to the content changes the hash.
- Time-Certified: The blockchain provides verifiable timestamps.
- Immutability: Once recorded, the hash cannot be altered.
- Privacy by design: No sensitive data is transmitted or stored.
Using the Stampiz API, you can implement the concept of proof-of-existence for digital content.
The service exposes one or two REST endpoints, fully documented, easy to use, integrate, and customize. With a simple integration, you can anchor the proofs of existence of your files on the Bitcoin and Polygon blockchains, without having to manage complex nodes or private keys on-chain.
Notarization on Bitcoin and Polygon
Using the Stampiz API, you can notarize on the Bitcoin and Polygon blockchains. Below is a brief comparison table.
| Feature | Bitcoin | Polygon |
|---|---|---|
| Blockchain (type) | Public, Layer 1 | Publica, Layer 2 (Ethereum sidechain) |
| Consensus Protocol | Proof of Work (PoW) | Proof of Stake (PoS) |
| Notarization Method | Hash in OP_RETURN Field | Stampiz Smart Contract |
| Notarized Data Size | Hash Digest →️ Only 32 Bytes | Hash Digest → Only 32 Bytes |
| Time Granularity | Less than 6 Hours | Less than 1 Minute |
| Immutability Guarantee | Very High | High |
| Decentralization | Very High | High |
| Smart Contract | No | Yes |
| Standard | High | Medium |
| Scalability | High | High |
| Traceability | High | Very High |
| Legal Tender | Very High | High (ideal for frequent notarizations) |
How It Works
-
Calculating the Hash
- The user calculates the SHA-256 hash of the digital content.
-
Sending the Hash
- The hash is sent to the API along with the API key required to access the service and provided upon request by Stampiz (API_KEY).
-
Notarization
- The service notarizes the hash on the chosen blockchain.
-
Receiving the Proof
- The API returns a proof of notarization (certificate) with the transaction details and/or a URL containing the proof-of-existence of the digital content.
The certificate returned by Stampiz is universally valid, independent of Stampiz, and carries absolute evidentiary value.
Prerequisites
-
An API key (
API_KEY) provided by Stampiz. -
A tool to calculate the SHA-256 hash, such as
openssl,sha256sum, orhashlib, or alternatively a customizable tool provided by Stampiz.
Use Cases
- Document certification: contracts, diplomas, legal documents
- Proof of existence: demonstrating that digital content existed at a certain date
- Data integrity: verifying that digital content has not been altered
- Intellectual property protection
- Audit trail of files, datasets, logs, reports, and AI output
- Compliance with legal requirements
Information and requests
Use the contact form or simply write to info@stampiz.io
Stampiz API: your proof, carved in digital stone.