Louise Toppin
type: MusicGroup
popularity: 3
followers: 69
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x22411cb6df75910199cf0c9a523b3508d79e46e9981fdd84c4c08adc154ef2f8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7594ffa6-3704-4bd9-b0be-205152660b39.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7594ffa6-3704-4bd9-b0be-205152660b39.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7594ffa6-3704-4bd9-b0be-205152660b39
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x22411cb6df75910199cf0c9a523b3508d79e46e9981fdd84c4c08adc154ef2f8","name":"Louise Toppin","registered_at":"2026-06-17T06:36:17Z","symbol":"NIM1311637","token_address":"0xab4c7bcd2de906fc57bc802fcef323233d27768f","type":"artist","uuid":"7594ffa6-3704-4bd9-b0be-205152660b39"}
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 0x22411cb6df75910199cf0c9a523b3508d79e46e9981fdd84c4c08adc154ef2f8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7594ffa6-3704-4bd9-b0be-205152660b39.json and https://artists.proofprofile.net/proofs/artist/7594ffa6-3704-4bd9-b0be-205152660b39.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x22411cb6df75910199cf0c9a523b3508d79e46e9981fdd84c4c08adc154ef2f8","name":"Louise Toppin","registered_at":"2026-06-17T06:36:17Z","symbol":"NIM1311637","token_address":"0xab4c7bcd2de906fc57bc802fcef323233d27768f","type":"artist","uuid":"7594ffa6-3704-4bd9-b0be-205152660b39"}
album: Ah! Love, But a Day
  type: MusicAlbum
  date published: 2000-02-01
album: Heart on the Wall: African American Art Songs for Orchestra
  type: MusicAlbum
  date published: 2011-11-01
album: La saison des fleurs
  type: MusicAlbum
  date published: 2017-03-01
album: Dear Friends & Gentle Hearts: African American Art Song Essentials
  type: MusicAlbum
  date published: 2025-02-07
album: Dear Friends & Gentle Hearts
  type: MusicAlbum
  date published: 2025-02-07