Alpa
type: MusicGroup
description: thumb|The Alpa Reflex Alpa is a designer and manufacturer company which designs high-end medium-format cameras (Website alpa.ch). The current owners bought the company name after the bankruptcy of th
popularity: 7
followers: 5450
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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  value: 2026-06-17T04:15:20Z
additional property: OTSCanonicalRecord
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05093488d2e2496e0ed6d71ede73ee945363f2ef98160226cac019655308c204. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/405b194a-a1d6-48b9-b0fa-3185d6977f95.json and https://artists.proofprofile.net/proofs/artist/405b194a-a1d6-48b9-b0fa-3185d6977f95.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T04:15:20Z
album: Slé7
  type: MusicAlbum
  date published: 2018-01-05
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  date published: 2020-12-18
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  type: MusicAlbum
  date published: 2021-03-27
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  type: MusicAlbum
  date published: 2021-09-28
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  date published: 2023-02-17
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album: Violencia
  type: MusicAlbum
  date published: 2024-08-10
  track: Du Serieux
    type: MusicRecording
    duration: PT2M47S
    duration ms: 167180
    explicit: false
    by artist: Alpa
    in album: Violencia
      type: MusicAlbum
      date published: 2024-08-10
    isrc code: FR8GV2419150
    additional property: CopyrightID
    additional property: CopyrightStatus
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    additional property: OTSBitcoinBlockVerifyURL
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    additional property: OTSVerificationAPI
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      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8GV2419150
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551527bc41f22611db7e743a59d3177779f52b810e7f758d26676c634f39f427. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR8GV2419150.
      date published: 2026-07-05T01:12:41Z
    audio: Du Serieux
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
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      additional property: Musical Key
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      additional property: Mode (Major/Minor)
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      additional property: Loudness (dB)
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      additional property: Key Name
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      additional property: Mode Name
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album: Connecté
  type: MusicAlbum
  date published: 2025-02-13
album: 132
  type: MusicAlbum
  date published: 2025-07-25