SPECIMEN — demonstration record. This record exists to show how a Metal Stack verification looks. It is not a real verification, its photographs are illustrative, and it will be removed as the live register grows.

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1/10 oz Gold Eagle

Gold .9167 — Item #9301458

US Mint Gold Eagle, 1/10 troy ounce. 22 ct crown gold - the .9167 reading is correct for this coin.

Metal

Gold

Analysis

Au 91.68%

Weight

3.39 g

Dimensions

D16.5 x 1.3 mm

Tamper seal

Applied ✓

Record hash

d9850d1e579e…

✓ Matches American Gold Eagle 1/10oz spec

Checks Performed

PASS

Weight

3.39 g — SCALE-01

PASS

Magnet

Non-magnetic; eddy-slide consistent with high-conductivity metal

PASS

Composition

Au 91.68% — XRF-01

PASS

Conductivity

Au .9167 ✓ — PMV-01

PASS

Inspection

Design, edge and marks consistent with a genuine example; no plating wear; no concerns under magnification/UV

PASS

Dimensions

D16.5 x 1.3 mm - matches published spec — CAL-01

PASS

Ping

Resonance within expected profile

These are the checks performed on this item — the right tests for its form. We never imply a check we didn’t run.

Instrument Analysis

XRF-01

Au 91.68% · cal. 2026-05-28

PMV-01

Au .9167 ✓ · cal. 2026-06-01

Operator

PS · Metal Stack

Tested

2026-06-12

Composition — averaged reading (XRF)

Au91.68%

Ag3.1%

Cu5.2%

Verification Record

Record #9301458 · metalstack.app/9301458

Verification Details

Opened

2026-06-12 09:42:10 UTC

Completed

2026-06-12 10:14:02 UTC

Operator

PS · Metal Stack

Checks

7 recorded · bench check

Tamper seal

Hologram applied

Metal Stack Item Register

Item Details

Item No.

#9301458

Name

1/10 oz Gold Eagle

Metal

Gold .9167

Weight

3.39 g

Analysis

Au 91.68%

Photos

0 archived with hashes

Status

Verified

Audit Trail

Timestamp	Event
2026-06-12 09:42:10 UTC	Item received into intake
2026-06-12 09:48:31 UTC	Weighed: 3.39 g - SCALE-01, operator PS
2026-06-12 09:51:07 UTC	Magnet & eddy-slide: non-magnetic, high-conductivity response
2026-06-12 09:54:20 UTC	Composition: Au 91.68% - XRF-01, operator PS
2026-06-12 09:56:40 UTC	Conductivity (secondary): Au .9167 ✓ - PMV-01 (Sigma)
2026-06-12 10:00:05 UTC	Inspection: marks & construction consistent; no plating wear
2026-06-12 10:02:40 UTC	Supplementary: dimensions D16.5 x 1.3 mm match spec; ping within profile
2026-06-12 10:08:15 UTC	Tamper-evident hologram seal applied
2026-06-12 10:11:23 UTC	Record published - status: verified
2026-06-12 10:14:02 UTC	Verification card MS-9301458 issued

Record Hash · SHA-256

d9850d1e579e25b049540e546853565f014545541dedc6c8e75987d314b6c528

This record is generated from the Metal Stack item register and provides a tamper-evident log of the checks performed on this item. The record hash is SHA-256 over the verification facts and photograph fingerprints — any alteration to those changes the hash. Events are appended only; the register does not permit editing of past entries.

Metal Stack checks are non-destructive. They indicate that this item is consistent with the stated metal. Internal adulteration cannot be fully excluded without advanced testing. They are not a guarantee of authenticity, not a statement of legal fineness, and not a substitute for official hallmarking or assay-office certification. Under the Hallmarking Act 1973, legal fineness is determined only by a UK Assay Office hallmark.

Don't take our word for it — check the maths yourself. This record's fingerprint is computed from published data only. Your browser will fetch that data, re-run SHA-256 on your own device and compare the result — then let you try to tamper with the record and watch the fingerprint destroy itself. Prefer raw data? It's at /9301458/record.json.

₿The whole register is timestamped onto the Bitcoin blockchain every day via OpenTimestamps — the same SHA-256 cryptography Bitcoin runs on — so its history can't be backdated, by us or anyone. See the live proof →

⚠ Check the address

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✓ Match the item

Compare the item in hand against the photographs and the weight to 0.01 g. The tamper hologram must be intact — it shows a clear VOID pattern when lifted, so a damaged or missing hologram means the seal is void.