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

Block 18513

Hash
000000cc2de7085e099645ce22706e2d61af36a4813b1ffeff7099cecab27101
Confirmations
22667
Time
2026-10-09 11:10:07 UTC
Median time
2026-10-09 11:01:43 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
687d4e74b77a7d3edb18c1b0cd75659177289b166eb000242fba80f4464502fa
Previous block
00000018985cde52fe312ddfe2f4f89ea8ddce5c16b411826f26abfd88ed9292
Next block
000000e8c64a59d0dba108221d5e2cff9452b48da4b48cc78f9d1ad42a01faa8

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 18513 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
6df532050bf769839de6780e83b56cdd… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
687d4e74b77a…80f4464502fa coinbase1250