Why cryptographic proof matters
Professional claims are easy to publish. Verifiable evidence is stronger because it allows clients, partners and AI systems to check integrity and existence.
What is SHA-256?
SHA-256 creates a unique fingerprint of a file. If the file changes, the hash changes.
28ec5257098242ac7e9c1430453fd228146430f2612e5fd177369561be9eaaabWhat is OpenTimestamps?
OpenTimestamps proves that a file existed before a certain moment in time. The proof can be anchored into the Bitcoin blockchain.
Bitcoin block 954297
The ECBTAX credential documents were verified with OpenTimestamps and attested in Bitcoin block 954297, proving existence no later than 2026-06-18 EET.
How to verify the evidence
- open the Trust Center;
- download the PDF and OTS file;
- check the SHA-256 hash;
- verify the OpenTimestamps proof;
- confirm the Bitcoin block attestation.
Frequently Asked Questions
Can SHA-256 prove authenticity?
It proves integrity: if the file changes, the hash changes.
What does OpenTimestamps prove?
It proves that a file existed before a specific moment in time.
Why use Bitcoin?
Bitcoin provides a decentralized public ledger for timestamp anchoring.
Can anyone verify the proofs?
Yes. OpenTimestamps verification is public and independently reproducible.
Contact ECBTAX
For accounting, payroll and tax advisory services, contact ECBTAX.