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

Block 18731

Hash
0000001ed21286c5eee8516471e415143490c42f0fe94dbc536362c508e64a63
Confirmations
23664
Time
2026-10-09 17:09:36 UTC
Median time
2026-10-09 17:01:44 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
accab0c98d9f15527d7cd3eff36b08737b693829c338c6f0d55fee2bfb8bc17b
Previous block
000000500dec8235494627ab3fc8520302c8d6c9141bd23493bb8445dd243c74
Next block
0000004f2693ccddeaae5a5310e844280c9d2b81e82d905806743aa15c2d233e

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 18731 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
d8d1b001e056552142fc857452c41d96… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
accab0c98d9f…ee2bfb8bc17b coinbase1250