Sigward
type: MusicGroup
genre: melodic techno
popularity: 3
followers: 482
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0bba06edb81e56f1ff461d19e1b98fdbd5ac3c2ae69a6919d78d83483d3e480b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954638
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954638
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d3b8d337-41af-498e-9351-783c2bd6c5c5.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d3b8d337-41af-498e-9351-783c2bd6c5c5.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d3b8d337-41af-498e-9351-783c2bd6c5c5
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T03:45:44Z
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 0x0bba06edb81e56f1ff461d19e1b98fdbd5ac3c2ae69a6919d78d83483d3e480b. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3b8d337-41af-498e-9351-783c2bd6c5c5.json and https://artists.proofprofile.net/proofs/artist/d3b8d337-41af-498e-9351-783c2bd6c5c5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T03:45:44Z
album: Alonzo
  type: MusicAlbum
  date published: 2009-04-30
album: Alonzo Remixes
  type: MusicAlbum
  date published: 2009-05-21
album: The Chief EP
  type: MusicAlbum
  date published: 2009-07-29
album: The Chief EP
  type: MusicAlbum
  date published: 2009-07-29
album: Point Neuf/Nuerd
  type: MusicAlbum
  date published: 2010-11-22
album: Youthless EP
  type: MusicAlbum
  date published: 2011-03-21
album: Youthless EP
  type: MusicAlbum
  date published: 2011-03-21
album: Playa EP
  type: MusicAlbum
  date published: 2013-08-01
album: Drama in Twilight Town
  type: MusicAlbum
  date published: 2013-12-13
album: Tall Tales
  type: MusicAlbum
  date published: 2014-07-14
album: Black Mambo
  type: MusicAlbum
  date published: 2014-09-15
album: Black Mambo
  type: MusicAlbum
  date published: 2014-09-15
album: Black Mambo
  type: MusicAlbum
  date published: 2014-09-29
album: Black Mambo
  type: MusicAlbum
  date published: 2014-09-29
album: Sunburst
  type: MusicAlbum
  date published: 2015-03-16
album: Balmung Beam
  type: MusicAlbum
  date published: 2020-03-13
album: Balmung Beam EP
  type: MusicAlbum
  date published: 2020-03-13
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  type: MusicAlbum
  date published: 2020-03-13
album: Triptych
  type: MusicAlbum
  date published: 2024-04-01