Closing Sunday
type: MusicGroup
genre: pop punk
popularity: 19
followers: 495
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd648843034d5818407d32b7c0f36faa1bd050d5fdf85a00c7a97800f6b7b6c68
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953762
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953762
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b901d1a6-1546-419b-a027-094d489245e9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b901d1a6-1546-419b-a027-094d489245e9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b901d1a6-1546-419b-a027-094d489245e9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T08:21:23Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd648843034d5818407d32b7c0f36faa1bd050d5fdf85a00c7a97800f6b7b6c68","name":"Closing Sunday","registered_at":"2026-06-14T23:54:47Z","symbol":"NIM0616729","token_address":"0xff28d561a17b758feed5b4906297598da806749d","type":"artist","uuid":"b901d1a6-1546-419b-a027-094d489245e9"}
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 0xd648843034d5818407d32b7c0f36faa1bd050d5fdf85a00c7a97800f6b7b6c68. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b901d1a6-1546-419b-a027-094d489245e9.json and https://artists.proofprofile.net/proofs/artist/b901d1a6-1546-419b-a027-094d489245e9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-15T08:21:23Z
  text: {"copyright_id":"0xd648843034d5818407d32b7c0f36faa1bd050d5fdf85a00c7a97800f6b7b6c68","name":"Closing Sunday","registered_at":"2026-06-14T23:54:47Z","symbol":"NIM0616729","token_address":"0xff28d561a17b758feed5b4906297598da806749d","type":"artist","uuid":"b901d1a6-1546-419b-a027-094d489245e9"}
album: Closing Sunday
  type: MusicAlbum
  date published: 2017-10-03
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