NOSTALGIA
type: MusicGroup
description: thumb|The archives director for The Saturday Evening Post said that the magazine has been regarded with "a mixture of nostalgia and affection". Shown: a Norman Rockwell cover from August 1924. Nostal
popularity: 3
followers: 106
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1d655c076688a20cf327266e02a1c8534f2224af9117936a3df304960270702c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/83d17af6-8e50-4253-9471-f12548ffec8b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/83d17af6-8e50-4253-9471-f12548ffec8b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/83d17af6-8e50-4253-9471-f12548ffec8b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
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 0x1d655c076688a20cf327266e02a1c8534f2224af9117936a3df304960270702c. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83d17af6-8e50-4253-9471-f12548ffec8b.json and https://artists.proofprofile.net/proofs/artist/83d17af6-8e50-4253-9471-f12548ffec8b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
album: На ладони линия
  type: MusicAlbum
  date published: 2023-02-05
album: Берёзовая роща
  type: MusicAlbum
  date published: 2023-02-12
album: Не уезжай
  type: MusicAlbum
  date published: 2023-04-14
  track: Не уезжай
    type: MusicRecording
    duration: PT5M16S
    duration ms: 316849
    explicit: false
    by artist: NOSTALGIA
    in album: Не уезжай
      type: MusicAlbum
      date published: 2023-04-14
    isrc code: FRX282349501
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T11:26:50+00:00
    additional property: CopyrightChainExplorerURL
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      value: https://explorer.copyrightchains.com/tx/0x99f6cd581b346ab0ea5fd7bb82d389cf8e9d36f34b601eee1eee20a571c41ca2
    additional property: OTSHash
    additional property: OTSBitcoinBlock
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      value: 956822
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956822
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX282349501
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T18:48:28Z
    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 0x99f6cd581b346ab0ea5fd7bb82d389cf8e9d36f34b601eee1eee20a571c41ca2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX282349501.
      date published: 2026-07-05T18:48:28Z
    audio: Не уезжай
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 124.997
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.724
      additional property: Energy
        type: PropertyValue
        value: 0.871
      additional property: Speechiness
        type: PropertyValue
        value: 0.04
      additional property: Acousticness
        type: PropertyValue
        value: 0
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.343
      additional property: Liveness
        type: PropertyValue
        value: 0.072
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.923
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.202
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Minor