21 StayDown
type: MusicGroup
popularity: 2
followers: 10
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd1a1f2f77b253d673734bd2d6a251e8ab8e874522be2093b8da13266dc5bea0a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953922
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953922
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1bc0795c-5e15-4045-981d-c819185f948f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1bc0795c-5e15-4045-981d-c819185f948f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1bc0795c-5e15-4045-981d-c819185f948f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T09:36:34Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd1a1f2f77b253d673734bd2d6a251e8ab8e874522be2093b8da13266dc5bea0a","name":"21 StayDown","registered_at":"2026-06-15T23:12:44Z","symbol":"NIM0862085","token_address":"0x021aec6c05e4134dc0714e97977134ecc224d23a","type":"artist","uuid":"1bc0795c-5e15-4045-981d-c819185f948f"}
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 0xd1a1f2f77b253d673734bd2d6a251e8ab8e874522be2093b8da13266dc5bea0a. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bc0795c-5e15-4045-981d-c819185f948f.json and https://artists.proofprofile.net/proofs/artist/1bc0795c-5e15-4045-981d-c819185f948f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0xd1a1f2f77b253d673734bd2d6a251e8ab8e874522be2093b8da13266dc5bea0a","name":"21 StayDown","registered_at":"2026-06-15T23:12:44Z","symbol":"NIM0862085","token_address":"0x021aec6c05e4134dc0714e97977134ecc224d23a","type":"artist","uuid":"1bc0795c-5e15-4045-981d-c819185f948f"}