Ninth Floor
type: MusicGroup
genre: bass music
genre: melbourne bounce
description: Ninth Floor is a 2015 National Film Board of Canada documentary film written and directed by Mina Shum about the 1969 Sir George Williams affair, a student occupation led by Black West Indian-born stu
popularity: 8
followers: 406
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x35b2703a29e1a86c40b587e79ef0de3bb825ae859a8d89da710b88fe27c45f92
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954031
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954031
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3a98c271-bf01-4a00-8aac-4305b08a3295.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3a98c271-bf01-4a00-8aac-4305b08a3295.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3a98c271-bf01-4a00-8aac-4305b08a3295
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T01:43:23Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x35b2703a29e1a86c40b587e79ef0de3bb825ae859a8d89da710b88fe27c45f92","name":"Ninth Floor","registered_at":"2026-06-16T10:01:19Z","symbol":"NIM1016972","token_address":"0xaf0eeebc7ffabc7a96072dbeb969690cb5ebf6cf","type":"artist","uuid":"3a98c271-bf01-4a00-8aac-4305b08a3295"}
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 0x35b2703a29e1a86c40b587e79ef0de3bb825ae859a8d89da710b88fe27c45f92. Chain 2 (Bitcoin): anchored in block 954031 (2026-06-17T01:43:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a98c271-bf01-4a00-8aac-4305b08a3295.json and https://artists.proofprofile.net/proofs/artist/3a98c271-bf01-4a00-8aac-4305b08a3295.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T01:43:23Z
  text: {"copyright_id":"0x35b2703a29e1a86c40b587e79ef0de3bb825ae859a8d89da710b88fe27c45f92","name":"Ninth Floor","registered_at":"2026-06-16T10:01:19Z","symbol":"NIM1016972","token_address":"0xaf0eeebc7ffabc7a96072dbeb969690cb5ebf6cf","type":"artist","uuid":"3a98c271-bf01-4a00-8aac-4305b08a3295"}
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