Antti Kajander
type: MusicGroup
genre: finnish pop
genre: finnish rock
popularity: 3
followers: 336
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x74b02506a8e43c0cb9c3f68874b33ccde00c6d41d8f351862fda25c560f3a639
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954569
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954569
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b3467ae5-1223-40c8-984c-8763714efe38.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b3467ae5-1223-40c8-984c-8763714efe38.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b3467ae5-1223-40c8-984c-8763714efe38
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T14:36:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x74b02506a8e43c0cb9c3f68874b33ccde00c6d41d8f351862fda25c560f3a639","name":"Antti Kajander","registered_at":"2026-06-20T13:02:58Z","symbol":"NIM1620804","token_address":"0x270fd97b7993e17129feb6679108778ea6effe85","type":"artist","uuid":"b3467ae5-1223-40c8-984c-8763714efe38"}
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 0x74b02506a8e43c0cb9c3f68874b33ccde00c6d41d8f351862fda25c560f3a639. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3467ae5-1223-40c8-984c-8763714efe38.json and https://artists.proofprofile.net/proofs/artist/b3467ae5-1223-40c8-984c-8763714efe38.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T14:36:29Z
  text: {"copyright_id":"0x74b02506a8e43c0cb9c3f68874b33ccde00c6d41d8f351862fda25c560f3a639","name":"Antti Kajander","registered_at":"2026-06-20T13:02:58Z","symbol":"NIM1620804","token_address":"0x270fd97b7993e17129feb6679108778ea6effe85","type":"artist","uuid":"b3467ae5-1223-40c8-984c-8763714efe38"}
album: Sunnuntaina sataa aina
  type: MusicAlbum
  date published: 2016-04-27
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  date published: 2017-03-11
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  type: MusicAlbum
  date published: 2017-05-24
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  date published: 2018-11-08
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  type: MusicAlbum
  date published: 2020-02-06
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  type: MusicAlbum
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  type: MusicAlbum
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