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

Block 18678

Hash
000000c97bccc0c7d6db32a6aea00e80bc64629ee75abdf82be2920a5f4bf980
Confirmations
23272
Time
2026-10-09 15:42:08 UTC
Median time
2026-10-09 15:33:42 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
a217b7cc326119a8689a015158867312903d9fc682742538d7e4888095ace259
Previous block
000000201f9d6cdb8f991e4a3f748b2c2f8c3988e8ddb2f0e0033c77c94e1cc6
Next block
0000004153a7152f2862e7d928c5ff4f4d88c826af4c0dd9b3180210013b12c9

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 18678 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
92c0fd3f9e7597d5fa3932386c0da0ee… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
a217b7cc3261…888095ace259 coinbase1250