Ark-0
Ark-0 is a test network for trying things out. It may be reset at any time.

Block 18729

Hash
00000071c19f556a6dd1f867c22bad07d648a1e4f02a45589e7f82b07937605f
Confirmations
23398
Time
2026-10-09 17:06:24 UTC
Median time
2026-10-09 16:58:35 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
8a95c2ac9eaff49eccb6d01e4cd30e530e487bb4a47ed1cc730345fa2517144b
Previous block
0000011767d3fea3f9636be68dc3b40e74a398ac36cd0bfe4fa87bb4bbd8b932
Next block
000000500dec8235494627ab3fc8520302c8d6c9141bd23493bb8445dd243c74

ML-DSA-44 block signature (M2)

M2 is an experimental rule of this test network. From a height set in its build, a node that enforces M2 accepts a block only if, besides the classical signet signature, the block carries a valid ML-DSA-44 signature by the Ark-0 block key, in its coinbase's witness commitment output. This page shows that signature; it does not check it.

Block 18729 is below the activation height 20000: nodes do not require this signature, and only log the result of checking it when run with -debug=validation. The block producer adds it from height 18000 on, so that nodes can check it before it is required.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
20aae2a1b18b6dcb81f8b0ee2143eeaa… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
8a95c2ac9eaf…45fa2517144b coinbase1250