Jorma Katrama
type: MusicGroup
description: Jorma Kalevi Katrama (5 June 1936 – 2 January 2022) was a Finnish instrumentalist who specialized in violin and double bass. Katrama died on 2 January 2022, at the age of 85.Kontrabasisti Jorma Katram
popularity: 3
followers: 220
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerifyInstructions
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  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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb90029abd5a93187fb6de58360d7f85dcc2bf118c3e11bda2a61a0801e5f4b5. Chain 2 (Bitcoin): anchored in block 954031 (2026-06-17T01:43:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b0499a1-f24f-44f4-9546-fdab8697b5d6.json and https://artists.proofprofile.net/proofs/artist/3b0499a1-f24f-44f4-9546-fdab8697b5d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T01:43:23Z
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album: Contrabasso con sentimento
  type: MusicAlbum
  date published: 1995-02-03
album: Contrabasso Concertante
  type: MusicAlbum
  date published: 1998-08-14
album: Contrabbasso con bravura
  type: MusicAlbum
  date published: 2011
album: Contrabasso con amore
  type: MusicAlbum
  date published: 2011
track: Bottesini : Elegia in Re
  type: MusicRecording
  duration: PT5M10S
  duration ms: 310000
  explicit: false
  by artist: Giovanni Bottesini
  by artist: Jorma Katrama
  by artist: Margit Rahkonen
  in album: A Double-Bass Collection
    type: MusicAlbum
    date published: 1994-08-26
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38962009a843f0ebd0ccd43ae6657bac8e6f80b600e8e22d88595c7ebff4c598. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN9000126.
    date published: 2026-07-31T15:59:18Z
  audio: Bottesini : Elegia in Re
    type: AudioObject
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    additional property: Time Signature
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    additional property: Danceability
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    additional property: Energy
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    additional property: Speechiness
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    additional property: Acousticness
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    additional property: Instrumentalness
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    additional property: Liveness
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    additional property: Valence (Positivity)
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    additional property: Loudness (dB)
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    additional property: Key Name
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      value: D
    additional property: Mode Name
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      value: Major