Verified Documents
Certificates for the HIDEA outboard engines that Supratechnic distributes, each with a digital fingerprint recorded on a public blockchain, so you can check that a copy you hold is exactly the one we published, and whether it is still the current version.
- Published here. We publish each document on this page with its date and version.
- Fingerprint timestamped. The file’s fingerprint (not the file) is timestamped on a public blockchain through OpenTimestamps, a free public service.
- Check any copy. Choose a PDF below and your own device tells you whether it matches.
Check your copy
Received a HIDEA certificate from a dealer or someone else? Check it here before you rely on it.
Nothing is uploaded. Your browser reads the file and computes its fingerprint on your own device.
These certificates were issued by the Dutch Certification Institute (DCI) to the manufacturer, Hangzhou Hidea Power Machinery Co., Ltd., under the EU Recreational Craft Directive 2013/53/EU. Supratechnic publishes them as the exclusive distributor of HIDEA outboard engines in Malaysia and Singapore.
Noise emission certificates
Noise emission certificate: HDEF115
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprint5fda049230d1b262d9c4423738f8f2550f1ea44d93088df195207e9c8807420a
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Noise emission certificate: HDEF60 series
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprint1b5cc6b4e4b822ebd3ce5cb65011e3066d197ca031a04986650c0ab32a4d65c4
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Noise emission certificate: HDEF40 series
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprint4223e9e24fc05645db8be360e135c781bbc6f5e523dd33e71788ffde7d036dca
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Noise emission certificate: HDEF20 series
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprint4760cd966171667927a19379f1e6a00adefc3052c9d8bd5f775a254d2d15ea89
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Noise emission certificate: F20
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprint0a9aca48006e5b4a2c3f201487253f6f4c7298ad329b9449ba051667cbb4475c
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Noise emission certificate: F9.9
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprint0bf7cef6af377d98e0fb7aa24a8c7dab3e13d9262c7d59ceae91f3e55f4e3d28
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Noise emission certificate: F6
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprint02ab4964ec4328a5f2d151c4c34e87edd2ff10c292cb727e9056a71f75595ee5
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Noise emission certificate: F5
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprint017f0148231477f337242323efc0a4956b0b48e7ba43d64a0124b7c66ce8b0a6
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Noise emission certificate: F2.5
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprintad3a66bdd1e46dda2afd6ee4f880b1a433cea58d44197b9fdc61ec46ea082fe5
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EC / EU type-examination certificates
EU type-examination (exhaust emissions): HDEF130, HDEF115 and HDEF100 series
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprintbfaae428d23330dd7c61cccf539cf53b90735600695049c45d16a68c7a93e8e5
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EC type-examination: HDEF60, HDEF50 and HDEF40 series
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprint7fa1cce6178090633b0c87d41e916eb2c3706890f4d844efbed0dce276a3fec2
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EC type-examination: HDEF30 series
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprint5c2729af3a21245df409c7209f8390466720a9d689e5f1f570dd3d98366e26f5
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EC type-examination: HDEF20 series
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprinte10d4a21cdad4defabb1e7fedef5500473ef00a17595f77d8356c10631f07d2c
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EC type-examination: F40 and F30
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprint800e869d121237cc6585b9d26446e82313d2baa965dd8c35d4ee3eae2dbb0ac2
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EC type-examination: F25
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprint99967d4e234b907c65c5e115175ac3522dfe5be507b9798fdb97c12028a23773
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EC type-examination: F20
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprintb35059a96e254c435d896742dd7a21045249ed88026094dd19e32ad225061645
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EC type-examination: F15
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprinte51d43141e940f5ccf298ff2a1aee3e69f0763f631f2e13b25425c351f233935
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EC type-examination: F9.9 and F8
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprint484ce02d205e7d42e5681146910231c5b35fe106cf052e0e8a5d25a8edd3366c
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EC type-examination: F6
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprint3e57e9b71a9d54341e43bf9e254f6a262b7aa3a2dbf2eb28182cc09f40952720
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EC type-examination: F5 and F4
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprint1429cccb2038714f4ba1c3460ea5dc22156b60b3f06f17da7fcecd4875d1b453
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EC type-examination: F2.5
CurrentConfirmed on the public blockchain: block 974,365, 3 Nov 2026, 15:20 (Malaysia time). View block
Technical details
SHA-256 fingerprintb7d517246c54cee87a09d4c9f1eae1d49b78a89965b75239357cc0c40b5c64b4
Download proof (.ots) · Verify on OpenTimestamps
To check independently, download the document and its proof file, open opentimestamps.org and drop both files onto the page.
How this works
What is a fingerprint?
A fingerprint (SHA-256) is a short code calculated from every byte of a file. Change even one character and the fingerprint changes completely, so matching fingerprints mean identical files.
What does the public blockchain timestamp prove?
That a file with this exact fingerprint existed no later than the time of the public blockchain block shown. Nobody, including Supratechnic, can backdate or alter that record.
What does it not prove?
It does not vouch for what the document says, and it is not an endorsement by OpenTimestamps, by the public blockchain, or by any organisation named in a document. It only proves that this is the file Supratechnic published, unchanged, and when. The certificates themselves remain the responsibility of the bodies that issued them.
Why are some versions marked “Superseded”?
When a document is updated, the old file is removed from this site. Its fingerprint and proof stay listed so that an older copy can still be recognised as genuine but out of date.
How can I check without trusting this page?
Download the document and its .ots proof, then drop both onto opentimestamps.org. It checks the proof against the public blockchain independently of this website.