anna calla
type: MusicGroup
popularity: 11
followers: 287
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa0cb5b57a6a99efe98888cac67493183ee22fba4f528233b64f76eb307f4a7f7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953770
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953770
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9e7e2104-33fa-4a27-91a1-fc6df70f6910.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9e7e2104-33fa-4a27-91a1-fc6df70f6910.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9e7e2104-33fa-4a27-91a1-fc6df70f6910
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T09:50:11Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa0cb5b57a6a99efe98888cac67493183ee22fba4f528233b64f76eb307f4a7f7","name":"anna calla","registered_at":"2026-06-14T21:10:12Z","symbol":"NIM0577440","token_address":"0xb28781204afc5605ce77290ce517e9f8293663d3","type":"artist","uuid":"9e7e2104-33fa-4a27-91a1-fc6df70f6910"}
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 0xa0cb5b57a6a99efe98888cac67493183ee22fba4f528233b64f76eb307f4a7f7. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e7e2104-33fa-4a27-91a1-fc6df70f6910.json and https://artists.proofprofile.net/proofs/artist/9e7e2104-33fa-4a27-91a1-fc6df70f6910.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T09:50:11Z
  text: {"copyright_id":"0xa0cb5b57a6a99efe98888cac67493183ee22fba4f528233b64f76eb307f4a7f7","name":"anna calla","registered_at":"2026-06-14T21:10:12Z","symbol":"NIM0577440","token_address":"0xb28781204afc5605ce77290ce517e9f8293663d3","type":"artist","uuid":"9e7e2104-33fa-4a27-91a1-fc6df70f6910"}
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