Typewriter
type: MusicGroup
genre: grindcore
genre: hardcore punk
description: thumb|Mechanical typewriters, such as this 1930s Underwood, were long-time standards in government agencies, newsrooms, and offices. thumb|This late 1960s Olivetti Valentine typewriter designed by Ett
popularity: 2
followers: 225
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x937ba7c35f00c816312b1ec7e9870c8cc358ae388f8e025ae9ef0494e3392615
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954027
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954027
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/393191e0-b130-47c0-90ae-c902f06ac693.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/393191e0-b130-47c0-90ae-c902f06ac693.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/393191e0-b130-47c0-90ae-c902f06ac693
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T00:55:08Z
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 0x937ba7c35f00c816312b1ec7e9870c8cc358ae388f8e025ae9ef0494e3392615. Chain 2 (Bitcoin): anchored in block 954027 (2026-06-17T00:55:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/393191e0-b130-47c0-90ae-c902f06ac693.json and https://artists.proofprofile.net/proofs/artist/393191e0-b130-47c0-90ae-c902f06ac693.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T00:55:08Z
album: Demo 2023
  type: MusicAlbum
  date published: 2024-01-01
album: Split with Fire Camp
  type: MusicAlbum
  date published: 2025-01-24
album: Rehearsal Demo
  type: MusicAlbum
  date published: 2025-02-18