Vargkvint
type: MusicGroup
genre: neoclassical
popularity: 23
followers: 1788
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xef9c7b6fdcecfcbceb5785c14451cfbd9fb2c43ba4b50a4c2f83231da9c0434d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/572f2d02-831b-47a1-a1e0-af9e68abec16.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/572f2d02-831b-47a1-a1e0-af9e68abec16.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/572f2d02-831b-47a1-a1e0-af9e68abec16
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
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 0xef9c7b6fdcecfcbceb5785c14451cfbd9fb2c43ba4b50a4c2f83231da9c0434d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/572f2d02-831b-47a1-a1e0-af9e68abec16.json and https://artists.proofprofile.net/proofs/artist/572f2d02-831b-47a1-a1e0-af9e68abec16.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
album: Brus
  type: MusicAlbum
  date published: 2016-11-25
album: Drivved
  type: MusicAlbum
  date published: 2019-03-08
album: Drivved
  type: MusicAlbum
  date published: 2019-03-08
album: Hav
  type: MusicAlbum
  date published: 2019-04-05
album: Hav
  type: MusicAlbum
  date published: 2019-04-05
album: Drivved (Sun Rain Rework)
  type: MusicAlbum
  date published: 2020-03-06
album: Dösjö (Reimagined by Hoshiko Yamane)
  type: MusicAlbum
  date published: 2021-01-08
album: Håll Mig (Reimagined by Tim Linghaus)
  type: MusicAlbum
  date published: 2021-01-15
album: Hav Reimagined
  type: MusicAlbum
  date published: 2021-01-22
album: Efterskalv
  type: MusicAlbum
  date published: 2022-01-21
album: Efterskalv
  type: MusicAlbum
  date published: 2022-01-21
album: Stillhetens hav II
  type: MusicAlbum
  date published: 2023-04-28
album: Hecate
  type: MusicAlbum
  date published: 2023-05-19
album: Månens hav
  type: MusicAlbum
  date published: 2023-06-02
album: Månens hav
  type: MusicAlbum
  date published: 2023-06-02
album: Månens hav
  type: MusicAlbum
  date published: 2023-06-02
track: Efterskalv
track: Sea of Constant Sorrow (Vargkvint rework)
track: Pomegranate (Vargkvint Rework)

Efterskalv
type: MusicRecording
duration: PT3M49S
duration ms: 229350
explicit: false
by artist: Vargkvint
in album: Piano Day, Vol. 1
  type: MusicAlbum
  date published: 2022-03-29
popularity: 0
isrc code: DELV42101282
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T14:06:14+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xbcb0dae07af664491691ad20ffa85452f6b241984b45c92cff881364b5ebff1f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELV42101282
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19+00:00
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 957118
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-08T03:20:19+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb0dae07af664491691ad20ffa85452f6b241984b45c92cff881364b5ebff1f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DELV42101282.
  date published: 2026-07-08T03:53:27Z
audio: Efterskalv
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 95.006
  additional property: Musical Key
    type: PropertyValue
    value: 1
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.28
  additional property: Energy
    type: PropertyValue
    value: 0.051
  additional property: Speechiness
    type: PropertyValue
    value: 0.034
  additional property: Acousticness
    type: PropertyValue
    value: 0.985
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.682
  additional property: Liveness
    type: PropertyValue
    value: 0.26
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.156
  additional property: Loudness (dB)
    type: PropertyValue
    value: -30.747
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Sea of Constant Sorrow (Vargkvint rework)
type: MusicRecording
duration: PT4M52S
duration ms: 292412
explicit: false
by artist: Frances Shelley
by artist: Vargkvint
in album: Sea of Constant Sorrow (Vargkvint Rework)
  type: MusicAlbum
  date published: 2024-02-01
isrc code: QM4TW2429274
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-27T10:11:12+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4471786678b7c941c12d081b4fcbca0687e0cc7c4d41b337c2db9d2eea9b68e6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2429274
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 956304
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-02T03:55:08+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4471786678b7c941c12d081b4fcbca0687e0cc7c4d41b337c2db9d2eea9b68e6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TW2429274.
  date published: 2026-07-02T03:55:08Z
audio: Sea of Constant Sorrow (Vargkvint rework)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 98.623
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.165
  additional property: Energy
    type: PropertyValue
    value: 0.05
  additional property: Speechiness
    type: PropertyValue
    value: 0.041
  additional property: Acousticness
    type: PropertyValue
    value: 0.962
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.888
  additional property: Liveness
    type: PropertyValue
    value: 0.087
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.06
  additional property: Loudness (dB)
    type: PropertyValue
    value: -28.774
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major

Pomegranate (Vargkvint Rework)
type: MusicRecording
duration: PT3M48S
duration ms: 228269
explicit: false
by artist: Sergio Díaz De Rojas
by artist: Vargkvint
in album: Pomegranate (Vargkvint Rework)
  type: MusicAlbum
  date published: 2021-07-08
genre: neoclassical
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f11a318ce089bf3b872886ce9d5463ceb7768f6670dab6d6522b3d694a44b1. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QM24S2103652.
  date published: 2026-07-29T12:41:21Z
audio: Pomegranate (Vargkvint Rework)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 147.186
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.198
  additional property: Energy
    type: PropertyValue
    value: 0.065
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.969
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.915
  additional property: Liveness
    type: PropertyValue
    value: 0.379
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.19
  additional property: Loudness (dB)
    type: PropertyValue
    value: -32.348
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Minor
isrc code: QM24S2103652
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960106
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-29T12:41:21+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S2103652
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960106
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960106
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-29T12:41:21+00:00
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