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

Block 18676

Hash
00000086b84868b789da7bfe1a463e0e132abd745bb4c402882afc73f9a9cfa2
Confirmations
23241
Time
2026-10-09 15:39:06 UTC
Median time
2026-10-09 15:30:26 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
c4f9877e5ad62c23358d9cb5aa07c48d95a870c9acd6d4b1c20ac264fc65f73e
Previous block
00000039af8cc760a4f28a0dca18d2a6f354551c774728d0acfa50b931c4e5d1
Next block
000000201f9d6cdb8f991e4a3f748b2c2f8c3988e8ddb2f0e0033c77c94e1cc6

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 18676 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
fd77dd6e6f33680014738e14c812929b… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
c4f9877e5ad6…c264fc65f73e coinbase1250