21st Century
type: MusicGroup
description: The 21st century is the current century in the Anno Domini or Common Era, in accordance with the Gregorian calendar. It began on 1 January 2001 (MMI), and will end on 31 December 2100 (MMC). It is the
popularity: 2
followers: 379
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x950262b2dc60c3265999fa3a71cd5f2b0a3011611b566926799e1a1c3da09666
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953936
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953936
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1ffb8d96-eee1-4f1f-bb96-9e49445a83ea.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1ffb8d96-eee1-4f1f-bb96-9e49445a83ea.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1ffb8d96-eee1-4f1f-bb96-9e49445a83ea
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T11:24:55Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x950262b2dc60c3265999fa3a71cd5f2b0a3011611b566926799e1a1c3da09666","name":"21st Century","registered_at":"2026-06-16T00:45:30Z","symbol":"NIM0884229","token_address":"0x3292c8424e2410722ab11d51671b4d1a4f1453a4","type":"artist","uuid":"1ffb8d96-eee1-4f1f-bb96-9e49445a83ea"}
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 0x950262b2dc60c3265999fa3a71cd5f2b0a3011611b566926799e1a1c3da09666. Chain 2 (Bitcoin): anchored in block 953936 (2026-06-16T11:24:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ffb8d96-eee1-4f1f-bb96-9e49445a83ea.json and https://artists.proofprofile.net/proofs/artist/1ffb8d96-eee1-4f1f-bb96-9e49445a83ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T11:24:55Z
  text: {"copyright_id":"0x950262b2dc60c3265999fa3a71cd5f2b0a3011611b566926799e1a1c3da09666","name":"21st Century","registered_at":"2026-06-16T00:45:30Z","symbol":"NIM0884229","token_address":"0x3292c8424e2410722ab11d51671b4d1a4f1453a4","type":"artist","uuid":"1ffb8d96-eee1-4f1f-bb96-9e49445a83ea"}
album: Ahead of Our Time
  type: MusicAlbum
  date published: 1975-08-01
album: Automatic Lover
  type: MusicAlbum
  date published: 1998-01-01
album: The Parachute Song / Hard Act To Follow
  type: MusicAlbum
  date published: 2011-03-11