Stemmings Duo
type: MusicGroup
genre: polka
popularity: 3
followers: 6
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x642643cd6d5fcb1c9a6d1f7d842bd850c498552d462fcb04ec30b31fe4bd84e7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954638
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954638
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d39f6b58-2853-4d0a-8550-2b7a29bce1b0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d39f6b58-2853-4d0a-8550-2b7a29bce1b0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d39f6b58-2853-4d0a-8550-2b7a29bce1b0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T03:45:44Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x642643cd6d5fcb1c9a6d1f7d842bd850c498552d462fcb04ec30b31fe4bd84e7","name":"Stemmings Duo","registered_at":"2026-06-21T01:47:24Z","symbol":"NIM1780891","token_address":"0x85f8a5a93186b65b25488f8d104d54f8a3071a6e","type":"artist","uuid":"d39f6b58-2853-4d0a-8550-2b7a29bce1b0"}
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 0x642643cd6d5fcb1c9a6d1f7d842bd850c498552d462fcb04ec30b31fe4bd84e7. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d39f6b58-2853-4d0a-8550-2b7a29bce1b0.json and https://artists.proofprofile.net/proofs/artist/d39f6b58-2853-4d0a-8550-2b7a29bce1b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T03:45:44Z
  text: {"copyright_id":"0x642643cd6d5fcb1c9a6d1f7d842bd850c498552d462fcb04ec30b31fe4bd84e7","name":"Stemmings Duo","registered_at":"2026-06-21T01:47:24Z","symbol":"NIM1780891","token_address":"0x85f8a5a93186b65b25488f8d104d54f8a3071a6e","type":"artist","uuid":"d39f6b58-2853-4d0a-8550-2b7a29bce1b0"}