Jena
type: MusicGroup
description: Jena (; ) is a city in Germany and the second largest city in Thuringia. Together with the nearby cities of Erfurt and Weimar, it forms the central metropolitan area of Thuringia with approximately 50
popularity: 30
followers: 520
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33947306b8bc1cb4d60d7cb28fe48e6a05010487a9f30be05306cc771365e7f3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8ea95e3-4980-48da-9d90-aa38bcecc41f.json and https://artists.proofprofile.net/proofs/artist/a8ea95e3-4980-48da-9d90-aa38bcecc41f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:28:13Z
track: Visions (feat. Jena)

Visions (feat. Jena)
type: MusicRecording
duration: PT3M33S
duration ms: 213750
explicit: false
by artist: Ranger Trucco
by artist: Jena
in album: Visions (feat. Jena)
  type: MusicAlbum
  date published: 2022-06-10
genre: bass-house
genre: tech-house
isrc code: UKRPL1900364
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  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
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe801d28bf8813f60a85605a8c62d927a5be2b6d5d8a78c0cf41b529ce2326d7f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKRPL1900364.
  date published: 2026-07-02T05:09:12Z
audio: Visions (feat. Jena)
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
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    value: 5
  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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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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  additional property: Mode Name
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