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

Block 18559

Hash
000000d7dde1e0ee8454b8c8fce59418ee221d1ede5ccb54790263952561f423
Confirmations
21900
Time
2026-10-09 12:26:54 UTC
Median time
2026-10-09 12:18:41 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
f2c0036dce4cd44de99998b2368f70367ccba21c775090c3ecc86616e9b7bf64
Previous block
00000067d3f4134e40134da90d0fd4057c9858a1c4702c8b8418e5807a921303
Next block
000000b80572eb457063fa230b62ef89258225020c07d7a465c28a74e4abbff4

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 18559 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
0553f47563948eacb0f555b269f5b1af… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
f2c0036dce4c…6616e9b7bf64 coinbase1250