Sad Bart Hours
type: MusicGroup
popularity: 36
followers: 6445
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x38cd8fb9269459cf0e51ac177b28a6ed6d69ca852c5b9ea3517385b59846aa00
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5a91e53d-d985-46f3-805b-e1dbfa944aef.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5a91e53d-d985-46f3-805b-e1dbfa944aef.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5a91e53d-d985-46f3-805b-e1dbfa944aef
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x38cd8fb9269459cf0e51ac177b28a6ed6d69ca852c5b9ea3517385b59846aa00","name":"Sad Bart Hours","registered_at":"2026-06-12T18:09:32Z","symbol":"NIM0331871","token_address":"0x3f7a29754cbd7e100c81f5821cf64bf71e65fb4a","type":"artist","uuid":"5a91e53d-d985-46f3-805b-e1dbfa944aef"}
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 0x38cd8fb9269459cf0e51ac177b28a6ed6d69ca852c5b9ea3517385b59846aa00. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a91e53d-d985-46f3-805b-e1dbfa944aef.json and https://artists.proofprofile.net/proofs/artist/5a91e53d-d985-46f3-805b-e1dbfa944aef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x38cd8fb9269459cf0e51ac177b28a6ed6d69ca852c5b9ea3517385b59846aa00","name":"Sad Bart Hours","registered_at":"2026-06-12T18:09:32Z","symbol":"NIM0331871","token_address":"0x3f7a29754cbd7e100c81f5821cf64bf71e65fb4a","type":"artist","uuid":"5a91e53d-d985-46f3-805b-e1dbfa944aef"}
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