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

Block 18875

Hash
000000ea2c3dc92708344492e07f20da6cafa6dd9cd3286c3b34a5074a8106bd
Confirmations
23229
Time
2026-10-09 21:08:15 UTC
Median time
2026-10-09 20:59:54 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
e8d95e2b57a910577b0538fcf7d826f680b56677b7200cdf867c5087a03b91b7
Previous block
000000a64636a549c061422662c703ee5fd23ebb4a879cd1ca32bfd3d432d0d4
Next block
00000078e6270d383680ee2fd085dbd31355b37f0fb607a9a9f3f407cd651bff

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 18875 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
2882a1d4edeb1350c85783c219ad1403… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
e8d95e2b57a9…5087a03b91b7 coinbase1250