Landmarq
type: MusicGroup
genre: art rock
genre: progressive metal
genre: progressive rock
genre: symphonic rock
description: Landmarq (pronounced like "landmark") are a British neo-prog band. Since forming in 1990, they have so far released a total of ten albums, four of which were recorded live at various concerts in the U
popularity: 6
followers: 3463
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0a242220666502f93accb03d3c1ddb4afa8d57130fa3acaf881fdb2f37a9afe1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6d7d21e5-c131-45a6-adb7-7bdfb62e7c4d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6d7d21e5-c131-45a6-adb7-7bdfb62e7c4d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6d7d21e5-c131-45a6-adb7-7bdfb62e7c4d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a242220666502f93accb03d3c1ddb4afa8d57130fa3acaf881fdb2f37a9afe1. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d7d21e5-c131-45a6-adb7-7bdfb62e7c4d.json and https://artists.proofprofile.net/proofs/artist/6d7d21e5-c131-45a6-adb7-7bdfb62e7c4d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
album: Entertaining Angels
  type: MusicAlbum
  date published: 1983-01-01
album: Turbulence (Live In Poland)
  type: MusicAlbum
  date published: 2009
album: Origins
  type: MusicAlbum
  date published: 2012-10-16
album: Roadskill - Live in the Netherlands
  type: MusicAlbum
  date published: 2012-10-16
album: Entertaining Angels
  type: MusicAlbum
  date published: 2012-11-12
album: Origins
  type: MusicAlbum
  date published: 2014-05-19
album: Roadskill - Live in the Netherlands
  type: MusicAlbum
  date published: 2015-06-01
album: Origins (Radio Edit)
  type: MusicAlbum
  date published: 2024-08-26