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

Block 18576

Hash
00000074c4f5a7766d5b2015e11a50ce6b55dafc49c7aac13babcaf88c661641
Confirmations
22468
Time
2026-10-09 12:55:26 UTC
Median time
2026-10-09 12:47:04 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
a2022e17d75c503c5f02f3efe497c801338e5160862aad0ea46c65a3f7a89a9a
Previous block
000000d0bc9e79ee2e670bd55744369dcae5d15c73bc23e1bbae0c20022711af
Next block
000000bc823672dcbbb57b89782bd825ef9d3ef603c93dfcbf098c65f6f87e50

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 18576 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
a319d1a05a505fde82b9c09e34ceb50a… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
a2022e17d75c…65a3f7a89a9a coinbase1250