Denarium physical bitcoins: Difference between revisions
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* 2.86 cm / 1.126 inches in diameter | * 2.86 cm / 1.126 inches in diameter | ||
* Solid brass | * Solid brass | ||
* Approximately 7.65 g / 0.269 ounces | |||
* Year printed on coins: 2015 | * Year printed on coins: 2015 | ||
* Denomination ("1/10 BTC") appears on the coin | * Denomination ("1/10 BTC") appears on the coin | ||
* Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper | * Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper | ||
| Line 29: | Line 29: | ||
* 2,86 cm / 1.126 inches in diameter | * 2,86 cm / 1.126 inches in diameter | ||
* Solid brass | * Solid brass | ||
* Approximately 7,65 g / 0.269 ounces | |||
* Year printed on coins: 2015 | * Year printed on coins: 2015 | ||
* Denomination ("1/100 BTC") appears on the coin | * Denomination ("1/100 BTC") appears on the coin | ||
* Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper | * Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper | ||
| Line 40: | Line 40: | ||
* 2,86 cm / 1.126 inches in diameter | * 2,86 cm / 1.126 inches in diameter | ||
* Solid brass | * Solid brass | ||
* Approximately 7,65 g / 0.269 ounces | |||
* Year printed on coins: 2015 | * Year printed on coins: 2015 | ||
* No denomination on the coin | * No denomination on the coin | ||
* Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper | * Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper | ||
| Line 51: | Line 51: | ||
* 4,06 cm / 1.598 inches inches in diameter | * 4,06 cm / 1.598 inches inches in diameter | ||
* .999 Fine Silver | * .999 Fine Silver | ||
* Approximately 31,10 g / 1.097 ounces (1 Troy ounce) | |||
* Year printed on coins: 2016 | * Year printed on coins: 2016 | ||
* The production volume: limited to 250 pcs | * The production volume: limited to 250 pcs | ||
* Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper | * Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper | ||
| Line 62: | Line 62: | ||
* 4,06 cm / 1.598 inches inches in diameter | * 4,06 cm / 1.598 inches inches in diameter | ||
* .999 Fine Silver with patinated finish | * .999 Fine Silver with patinated finish | ||
* Approximately 31,10 g / 1.097 ounces (1 Troy ounce) | |||
* Year printed on coins: 2016 | * Year printed on coins: 2016 | ||
* The production volume: limited to 100 pcs | * The production volume: limited to 100 pcs | ||
* Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper | * Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper | ||
| Line 74: | Line 74: | ||
* 4,06 cm / 1.598 inches in diameter | * 4,06 cm / 1.598 inches in diameter | ||
* .999 Fine Silver (99,9% silver) with gold finish | * .999 Fine Silver (99,9% silver) with gold finish | ||
* Approximately 31,10 g / 1.097 ounces (1 Troy ounce) | |||
* Year printed on coins: 2016 | * Year printed on coins: 2016 | ||
===Denarium 1/10 BTC Gold Plated=== | ===Denarium 1/10 BTC Gold Plated=== | ||
* 2,86 cm / 1.126 inches inches in diameter | |||
* 1,6 mm / 0,063 inches thick | |||
* Gold Plated (3 µm) Brass | |||
* Approximately 7,65 g / 0.27 ounces | |||
* Year printed on coins: 2015 | |||
===Denarium 1/100 BTC Gold Plated=== | ===Denarium 1/100 BTC Gold Plated=== | ||
[[Image:Denarium-1/100-Gold-Plated | |||
[[Image:Denarium-1/100-Gold-Plated.jpg|thumb|right|200px|1/100 Gold Plated]] | |||
* 2,86 cm / 1.126 inches in diameter | |||
* 1,6 mm / 0,063 inches thick | |||
* Gold Plated (3 µm) Brass | |||
* Approximately 7,65 g / 0.27 ounces | |||
* Year printed on coins: 2015 | |||
===Denarium Custom 0-2 BTC Gold Plated=== | ===Denarium Custom 0-2 BTC Gold Plated=== | ||
[[Image:Denarium-Custom-0-2-Gold-Plated.jpg|thumb|right|200px|Denarium Custom 0-2 Gold Plated]] | [[Image:Denarium-Custom-0-2-Gold-Plated.jpg|thumb|right|200px|Denarium Custom 0-2 Gold Plated]] | ||
* 2,86 cm / 1.126 inches in diameter | |||
* 1,6 mm / 0,063 inches thick | |||
* Gold Plated (3 µm) Brass | |||
* Approximately 7,65 g / 0.27 ounces | |||
* Year printed on coins: 2015 | |||
===Denarium 1 BTC Gold=== | ===Denarium 1 BTC Gold=== | ||
[[Image:Denarium-1-BTC-Gold.jpg|thumb|right|200px|Denarium 1 BTC Gold]] | [[Image:Denarium-1-BTC-Gold.jpg|thumb|right|200px|Denarium 1 BTC Gold]] | ||
* 30 mm / 1.181 inches in diameter | |||
* 1 Troy ounce (31,10 g / 1.097 ounces) | |||
* .999 Fine Gold (99,9% gold) | |||
* Year printed on coins: 2016 | |||
* Approximately 31,10 g / 1.097 ounces (1 Troy ounce) | |||
* The production volume: limited to 65 coins | |||
===Denarium 1/2 BTC Gold=== | ===Denarium 1/2 BTC Gold=== | ||
[[Image:Denarium-1/2-BTC-Gold.jpg|thumb|right|200px|Denarium 1/2 BTC Gold]] | [[Image:Denarium-1/2-BTC-Gold.jpg|thumb|right|200px|Denarium 1/2 BTC Gold]] | ||
* 29 mm / 1.142 inches in diameter | |||
* 1/2 Troy ounce (15,155 g / 0.549 ounces) | |||
* .999 Fine Gold (99,9% gold) | |||
* Year printed on coins: 2016 | |||
* Approximately 31,10 g / 1.097 ounces (1 Troy ounce) | |||
* The production volume: limited to 49 coins | |||
===Denarium Custom Silver=== | ===Denarium Custom Silver=== | ||
[[Image:Denarium-Custom-Silver.jpg|thumb|right|200px|Denarium Custom Silver]] | [[Image:Denarium-Custom-Silver.jpg|thumb|right|200px|Denarium Custom Silver]] | ||
* 3,90 cm / 1.535 inches in diameter | |||
* 1,6 mm / 0,063 inches thick | |||
* .999 Fine Silver (99,9% silver) | |||
* 1 Troy ounce (31,10 g / 1.097 ounces) | |||
* Proof quality | |||
* Year printed on coins: 2017 | |||
* The production volume: Batch: #1 499 coins, Batch # 2 Uncertain. | |||
* EAN / GTIN-13: 6430070871127 | |||
===Denarium Patinated Bronze=== | ===Denarium Patinated Bronze=== | ||
[[Image:Denarium-Patinated-Bronze.jpg|thumb|right|200px|Denarium Patinated Bronze]] | [[Image:Denarium-Patinated-Bronze.jpg|thumb|right|200px|Denarium Patinated Bronze]] | ||
* 4,06 cm / 1.598 inches inches in diameter | |||
* Bronze with a patina finish | |||
* Year printed on coins: 2017 | |||
* Approximately 31,92 g / 1.126 ounces | |||
Revision as of 12:30, 24 May 2018
Denarium physical bitcoins, also called Denarium coins, are physical metal coins created by a Finnish Bitcoin company Prasos (Prasos Ltd, Jyväskylä, Finland) that contain an embedded piece of paper with digital Bitcoin value, covered by a tamper-resistant hologram. Denarium coins are available in different BTC increments. They can be purchased at Denarium's website, https://www.denarium.com (multiple payment methods accepted: Bitcoin, Visa, Mastercard, IBAN/SEPA bank transfer).
The coins are designed such that they could be circulated in face-to-face transactions. The first person to redeem its private key gets the value on the coin, and afterwards, the coin no longer has any Bitcoin value. It is difficult or impossible to read the private key on the coin without damaging or destroying the hologram, which exposes a honeycomb-like tamper-evidence pattern when peeled.
The piece of durable paper inside each coin has a private key which forms the backing for the Bitcoin value represented by the coin. Private key is in 30-character mini private key format. Redeeming the private key back into digital Bitcoins is currently available with a patched reference client as well as with many alternative clients such as Mycelium.
Denarium coins are similar to Bitbills and Casascius physical bitcoins in that they are an object that contains a redemption code that serves as a bearer item for digital bitcoins.
Releases of Denarium coins
Original series 1/10 BTC coin
- 2.86 cm / 1.126 inches in diameter
- Solid brass
- Approximately 7.65 g / 0.269 ounces
- Year printed on coins: 2015
- Denomination ("1/10 BTC") appears on the coin
- Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
- First appeared in June 2015 [1].
- Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)
- All 4,000 Bitcoin addresses pre-generated for the series have been published on GitHub as automatically updating Bitcoin-signed list
Original series 1/100 BTC coin
- 2,86 cm / 1.126 inches in diameter
- Solid brass
- Approximately 7,65 g / 0.269 ounces
- Year printed on coins: 2015
- Denomination ("1/100 BTC") appears on the coin
- Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
- First appeared in June 2015 [2].
- Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)
Denarium Custom
- 2,86 cm / 1.126 inches in diameter
- Solid brass
- Approximately 7,65 g / 0.269 ounces
- Year printed on coins: 2015
- No denomination on the coin
- Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
- First appeared in December 2015.
- Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)
Denarium 1 BTC
- 4,06 cm / 1.598 inches inches in diameter
- .999 Fine Silver
- Approximately 31,10 g / 1.097 ounces (1 Troy ounce)
- Year printed on coins: 2016
- The production volume: limited to 250 pcs
- Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
- First appeared in March 2016
- Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)
Denarium 1 BTC Patinated
- 4,06 cm / 1.598 inches inches in diameter
- .999 Fine Silver with patinated finish
- Approximately 31,10 g / 1.097 ounces (1 Troy ounce)
- Year printed on coins: 2016
- The production volume: limited to 100 pcs
- Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
- First appeared in June 2016
- Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)
Denarium 1 BTC Silver Golden Edition
- 4,06 cm / 1.598 inches in diameter
- .999 Fine Silver (99,9% silver) with gold finish
- Approximately 31,10 g / 1.097 ounces (1 Troy ounce)
- Year printed on coins: 2016
Denarium 1/10 BTC Gold Plated
- 2,86 cm / 1.126 inches inches in diameter
- 1,6 mm / 0,063 inches thick
- Gold Plated (3 µm) Brass
- Approximately 7,65 g / 0.27 ounces
- Year printed on coins: 2015
Denarium 1/100 BTC Gold Plated
- 2,86 cm / 1.126 inches in diameter
- 1,6 mm / 0,063 inches thick
- Gold Plated (3 µm) Brass
- Approximately 7,65 g / 0.27 ounces
- Year printed on coins: 2015
Denarium Custom 0-2 BTC Gold Plated
- 2,86 cm / 1.126 inches in diameter
- 1,6 mm / 0,063 inches thick
- Gold Plated (3 µm) Brass
- Approximately 7,65 g / 0.27 ounces
- Year printed on coins: 2015
Denarium 1 BTC Gold
- 30 mm / 1.181 inches in diameter
- 1 Troy ounce (31,10 g / 1.097 ounces)
- .999 Fine Gold (99,9% gold)
- Year printed on coins: 2016
- Approximately 31,10 g / 1.097 ounces (1 Troy ounce)
- The production volume: limited to 65 coins
Denarium 1/2 BTC Gold
- 29 mm / 1.142 inches in diameter
- 1/2 Troy ounce (15,155 g / 0.549 ounces)
- .999 Fine Gold (99,9% gold)
- Year printed on coins: 2016
- Approximately 31,10 g / 1.097 ounces (1 Troy ounce)
- The production volume: limited to 49 coins
Denarium Custom Silver
- 3,90 cm / 1.535 inches in diameter
- 1,6 mm / 0,063 inches thick
- .999 Fine Silver (99,9% silver)
- 1 Troy ounce (31,10 g / 1.097 ounces)
- Proof quality
- Year printed on coins: 2017
- The production volume: Batch: #1 499 coins, Batch # 2 Uncertain.
- EAN / GTIN-13: 6430070871127
Denarium Patinated Bronze
- 4,06 cm / 1.598 inches inches in diameter
- Bronze with a patina finish
- Year printed on coins: 2017
- Approximately 31,92 g / 1.126 ounces