18 Seconds
type: MusicGroup
genre: post-rock
genre: space rock
popularity: 3
followers: 468
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x122a83ef8d58026cafbab592b2b20ab8711b84410bd8a732cc3f1d50231cc444
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954728
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954728
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f8b1d5ac-f6e8-4c41-8bd3-8a5f767a8c90.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f8b1d5ac-f6e8-4c41-8bd3-8a5f767a8c90.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f8b1d5ac-f6e8-4c41-8bd3-8a5f767a8c90
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T18:08:38Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x122a83ef8d58026cafbab592b2b20ab8711b84410bd8a732cc3f1d50231cc444","name":"18 Seconds","registered_at":"2026-06-21T16:11:13Z","symbol":"NIM1970411","token_address":"0x0b4cf15817e142980457a736adaad149273a2e19","type":"artist","uuid":"f8b1d5ac-f6e8-4c41-8bd3-8a5f767a8c90"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122a83ef8d58026cafbab592b2b20ab8711b84410bd8a732cc3f1d50231cc444. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8b1d5ac-f6e8-4c41-8bd3-8a5f767a8c90.json and https://artists.proofprofile.net/proofs/artist/f8b1d5ac-f6e8-4c41-8bd3-8a5f767a8c90.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T18:08:38Z
  text: {"copyright_id":"0x122a83ef8d58026cafbab592b2b20ab8711b84410bd8a732cc3f1d50231cc444","name":"18 Seconds","registered_at":"2026-06-21T16:11:13Z","symbol":"NIM1970411","token_address":"0x0b4cf15817e142980457a736adaad149273a2e19","type":"artist","uuid":"f8b1d5ac-f6e8-4c41-8bd3-8a5f767a8c90"}
album: When Fog Dissipates
  type: MusicAlbum
  date published: 2013-11-02
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  type: MusicAlbum
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  type: MusicAlbum
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