Roger Crowley
type: MusicGroup
description: Roger Crowley (born 1951) is a British historian and author known for his books on maritime and Mediterranean history. Life and career Roger Crowley was educated at Sherborne School and read English
popularity: 2
followers: 44
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xf2afcdc63c8eb37f39d2fcc4d505f57c121edfd85fc1bfa51794deaa102632db
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953903
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953903
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/143bf771-1e9b-4de7-8030-2e857e514d51.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/143bf771-1e9b-4de7-8030-2e857e514d51.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/143bf771-1e9b-4de7-8030-2e857e514d51
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:05:05Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf2afcdc63c8eb37f39d2fcc4d505f57c121edfd85fc1bfa51794deaa102632db","name":"Roger Crowley","registered_at":"2026-06-15T20:40:04Z","symbol":"NIM0825667","token_address":"0xd7ce3b536320f4cf7d80879e9b546d52b7f539f5","type":"artist","uuid":"143bf771-1e9b-4de7-8030-2e857e514d51"}
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
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  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2afcdc63c8eb37f39d2fcc4d505f57c121edfd85fc1bfa51794deaa102632db. Chain 2 (Bitcoin): anchored in block 953903 (2026-06-16T07:05:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/143bf771-1e9b-4de7-8030-2e857e514d51.json and https://artists.proofprofile.net/proofs/artist/143bf771-1e9b-4de7-8030-2e857e514d51.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-16T07:05:05Z
  text: {"copyright_id":"0xf2afcdc63c8eb37f39d2fcc4d505f57c121edfd85fc1bfa51794deaa102632db","name":"Roger Crowley","registered_at":"2026-06-15T20:40:04Z","symbol":"NIM0825667","token_address":"0xd7ce3b536320f4cf7d80879e9b546d52b7f539f5","type":"artist","uuid":"143bf771-1e9b-4de7-8030-2e857e514d51"}
album: Entscheidung im Mittelmeer (Europas Seekrieg gengen das Osmanische Reich)
  type: MusicAlbum
  date published: 2017-06-01
album: Konstantinopel 1453 - Die letzte Schlacht (Ungekürzt)
  type: MusicAlbum
  date published: 2017-10-02
album: Konstantinopel 1453 - Die letzte Schlacht (Ungekürzt)
  type: MusicAlbum
  date published: 2017-10-02
album: Entscheidung im Mittelmeer (Ungekürzt)
  type: MusicAlbum
  date published: 2017-10-02