Sophie Langdon
type: MusicGroup
genre: chamber music
popularity: 3
followers: 25
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x70c802aeb47dd31942e06b1300d962c2643f20f9717eb77ce1c82bde8dad23d7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954549
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954549
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a9b5af90-7b21-4339-be98-28eb92b628fb.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a9b5af90-7b21-4339-be98-28eb92b628fb.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a9b5af90-7b21-4339-be98-28eb92b628fb
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T10:56:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x70c802aeb47dd31942e06b1300d962c2643f20f9717eb77ce1c82bde8dad23d7","name":"Sophie Langdon","registered_at":"2026-06-20T08:57:52Z","symbol":"NIM1572618","token_address":"0xc36ba8a0dda1f3f665f5ec8435bcdcabd63b9cc4","type":"artist","uuid":"a9b5af90-7b21-4339-be98-28eb92b628fb"}
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 0x70c802aeb47dd31942e06b1300d962c2643f20f9717eb77ce1c82bde8dad23d7. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9b5af90-7b21-4339-be98-28eb92b628fb.json and https://artists.proofprofile.net/proofs/artist/a9b5af90-7b21-4339-be98-28eb92b628fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T10:56:20Z
  text: {"copyright_id":"0x70c802aeb47dd31942e06b1300d962c2643f20f9717eb77ce1c82bde8dad23d7","name":"Sophie Langdon","registered_at":"2026-06-20T08:57:52Z","symbol":"NIM1572618","token_address":"0xc36ba8a0dda1f3f665f5ec8435bcdcabd63b9cc4","type":"artist","uuid":"a9b5af90-7b21-4339-be98-28eb92b628fb"}