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

Block 18955

Hash
000000268556ed7e904dc15e50f804fa2953582a813a847c91050f248b344a09
Confirmations
22478
Time
2026-10-09 23:22:33 UTC
Median time
2026-10-09 23:14:18 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
78b6d67052ebd6e6fe3dafabcc77f4c670c445bc001c354acec2ba3a842c81bb
Previous block
00000110b26e1b9f3bb69244591075b21bed814c5d88c35d23ac9739994c23bc
Next block
000000ccff7ee8e2c9ed27ecbdc991ca2602aaf753c811abd4ca4959b2f721af

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 18955 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
e7bbc958a4f7f64a54add487096ca270… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
78b6d67052eb…ba3a842c81bb coinbase1250