Calpurnia
type: MusicGroup
genre: vancouver-indie
popularity: 41
followers: 547195
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x43a333931790b12120f56303b535e5d0070bd61fe2a45ca345d2ebbaa2f2423c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953423
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/953423
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/abd3e1ed-19c2-4480-9dfc-010e1f6fe011.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/abd3e1ed-19c2-4480-9dfc-010e1f6fe011.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/abd3e1ed-19c2-4480-9dfc-010e1f6fe011
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T21:20:00Z
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 → block must exist at that height 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 0x43a333931790b12120f56303b535e5d0070bd61fe2a45ca345d2ebbaa2f2423c. 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/abd3e1ed-19c2-4480-9dfc-010e1f6fe011.json and https://artists.proofprofile.net/proofs/artist/abd3e1ed-19c2-4480-9dfc-010e1f6fe011.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
album: Cell
  type: MusicAlbum
  date published: 2019-03-06
  track: Cell
    type: MusicRecording
    duration: PT3M15S
    duration ms: 195320
    explicit: false
    by artist: Calpurnia
    in album: Cell
      type: MusicAlbum
      date published: 2019-03-06
    isrc code: CAUM81900016
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-06-05T12:17:36+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x5650e4e291f0e6c7e6a0dfdbfc1890f1ec909c87dc3ef1ed0dd42a651767db32
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 953536
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block/953536
    additional property: OTSRecordURL
      type: PropertyValue
      value: https://artists.proofprofile.net/proofs/track/7DoYvD1nsLBr6vIpa2AT07.json
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7DoYvD1nsLBr6vIpa2AT07
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-06-13T17:25:41Z
    additional property: OTSCanonicalRecord
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. 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 0x5650e4e291f0e6c7e6a0dfdbfc1890f1ec909c87dc3ef1ed0dd42a651767db32. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7DoYvD1nsLBr6vIpa2AT07.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7DoYvD1nsLBr6vIpa2AT07.
      date published: 2026-06-13T17:25:41Z
album: Spotify Singles
  type: MusicAlbum
  date published: 2018-09-19
  track: Wasting Time - Recorded At Spotify Studios NYC
    type: MusicRecording
    duration: PT2M25S
    duration ms: 145280
    explicit: false
    by artist: Calpurnia
    in album: Spotify Singles
      type: MusicAlbum
      date published: 2018-09-19
    isrc code: CAUM81800209
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-06-08T10:33:27+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd4422e31c291b1a816607d2672fa7c7882a69bb0c3490087b8cea715eabf65b7
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 953520
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block/953520
    additional property: OTSRecordURL
      type: PropertyValue
      value: https://artists.proofprofile.net/proofs/track/5ff5WH1b1Te2PpVwLX9p96.json
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5ff5WH1b1Te2PpVwLX9p96
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-06-13T13:32:09Z
    additional property: OTSCanonicalRecord
      type: PropertyValue
      value: {"copyright_id":"0xd4422e31c291b1a816607d2672fa7c7882a69bb0c3490087b8cea715eabf65b7","isrc":"CAUM81800209","name":"Wasting Time - Recorded At Spotify Studios NYC","registered_at":"2026-06-08T10:33:27Z","spotify_id":"5ff5WH1b1Te2PpVwLX9p96","type":"track"}
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. 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 0xd4422e31c291b1a816607d2672fa7c7882a69bb0c3490087b8cea715eabf65b7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5ff5WH1b1Te2PpVwLX9p96.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5ff5WH1b1Te2PpVwLX9p96.
      date published: 2026-06-13T13:32:09Z
      text: {"copyright_id":"0xd4422e31c291b1a816607d2672fa7c7882a69bb0c3490087b8cea715eabf65b7","isrc":"CAUM81800209","name":"Wasting Time - Recorded At Spotify Studios NYC","registered_at":"2026-06-08T10:33:27Z","spotify_id":"5ff5WH1b1Te2PpVwLX9p96","type":"track"}
  track: Say It Ain't So - Recorded At Spotify Studios NYC
    type: MusicRecording
    duration: PT4M3S
    duration ms: 243053
    explicit: false
    by artist: Calpurnia
    in album: Spotify Singles
      type: MusicAlbum
      date published: 2018-09-19
    isrc code: CAUM81800210
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-06-04T07:36:57+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x02425d57605c2329dbd6aa5f5ec20049fc4606ff9534a04660b75334bea12f5d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 953536
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block/953536
    additional property: OTSRecordURL
      type: PropertyValue
      value: https://artists.proofprofile.net/proofs/track/4NBSkqCopxDtoMNABwtsce.json
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4NBSkqCopxDtoMNABwtsce
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-06-13T17:25:41Z
    additional property: OTSCanonicalRecord
      type: PropertyValue
      value: {"copyright_id":"0x02425d57605c2329dbd6aa5f5ec20049fc4606ff9534a04660b75334bea12f5d","isrc":"CAUM81800210","name":"Say It Ain't So - Recorded At Spotify Studios NYC","registered_at":"2026-06-04T07:36:57Z","spotify_id":"4NBSkqCopxDtoMNABwtsce","type":"track"}
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. 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 0x02425d57605c2329dbd6aa5f5ec20049fc4606ff9534a04660b75334bea12f5d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4NBSkqCopxDtoMNABwtsce.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4NBSkqCopxDtoMNABwtsce.
      date published: 2026-06-13T17:25:41Z
      text: {"copyright_id":"0x02425d57605c2329dbd6aa5f5ec20049fc4606ff9534a04660b75334bea12f5d","isrc":"CAUM81800210","name":"Say It Ain't So - Recorded At Spotify Studios NYC","registered_at":"2026-06-04T07:36:57Z","spotify_id":"4NBSkqCopxDtoMNABwtsce","type":"track"}
album: Scout
  type: MusicAlbum
  date published: 2018-06-15
  track: Louie
    type: MusicRecording
    duration: PT2M59S
    duration ms: 179573
    explicit: false
    by artist: Calpurnia
    in album: Scout
      type: MusicAlbum
      date published: 2018-06-15
    isrc code: CAUM81800076
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-06-08T03:04:50+00:00
    additional property: CopyrightChainExplorerURL
    additional property: OTSHash
    additional property: OTSBitcoinBlock
    additional property: OTSBitcoinBlockVerifyURL
    additional property: OTSRecordURL
    additional property: OTSVerificationAPI
    additional property: OTSTimestamp
    additional property: OTSCanonicalRecord
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
  track: Wasting Time
  track: Greyhound
  track: City Boy
  track: Blame
  track: Waves
track: Cell
track: Wasting Time - Recorded At Spotify Studios NYC
track: Say It Ain't So - Recorded At Spotify Studios NYC
track: Louie
track: Wasting Time
track: Greyhound
track: City Boy
track: Blame
track: Waves

CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0x1a6f9b4b5cb378eca31c4ab999bd0794a54ac225f5993ed94b6caa94da7f9bc1

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 953528

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block/953528

OTSRecordURL
type: PropertyValue
value: https://artists.proofprofile.net/proofs/track/3pWx8xu9e1F0rW89hGq51i.json

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3pWx8xu9e1F0rW89hGq51i

OTSTimestamp
type: PropertyValue
value: 2026-06-13T15:41:10Z

OTSCanonicalRecord
type: PropertyValue

OTSVerifyInstructions
type: PropertyValue
value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6f9b4b5cb378eca31c4ab999bd0794a54ac225f5993ed94b6caa94da7f9bc1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3pWx8xu9e1F0rW89hGq51i.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3pWx8xu9e1F0rW89hGq51i.
date published: 2026-06-13T15:41:10Z

Wasting Time
type: MusicRecording
duration: PT2M9S
duration ms: 129053
explicit: false
by artist: Calpurnia
in album: Scout
  type: MusicAlbum
  date published: 2018-06-15
isrc code: CAUM81800077
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-07T13:16:35+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x98fba760e18eba34e89736dcfcf3bd78a0303f2da411688d720d9a2af92446b2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953515
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/953515
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/track/14PSNGPO5qD04OWgeKAy11.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/14PSNGPO5qD04OWgeKAy11
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T12:53:06Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x98fba760e18eba34e89736dcfcf3bd78a0303f2da411688d720d9a2af92446b2","isrc":"CAUM81800077","name":"Wasting Time","registered_at":"2026-06-07T13:16:35Z","spotify_id":"14PSNGPO5qD04OWgeKAy11","type":"track"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. 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 0x98fba760e18eba34e89736dcfcf3bd78a0303f2da411688d720d9a2af92446b2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/14PSNGPO5qD04OWgeKAy11.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/14PSNGPO5qD04OWgeKAy11.
  date published: 2026-06-13T12:53:06Z
  text: {"copyright_id":"0x98fba760e18eba34e89736dcfcf3bd78a0303f2da411688d720d9a2af92446b2","isrc":"CAUM81800077","name":"Wasting Time","registered_at":"2026-06-07T13:16:35Z","spotify_id":"14PSNGPO5qD04OWgeKAy11","type":"track"}

Greyhound
type: MusicRecording
duration: PT4M48S
duration ms: 288240
explicit: false
by artist: Calpurnia
in album: Scout
  type: MusicAlbum
  date published: 2018-06-15
isrc code: CAUM81800078
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-04T16:00:26+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7747a91e154a478979cdec861e785a2d64c0e22d63a005d2e0e346418ac08c74
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953513
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/953513
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/track/28FIqAkTgmOzPzBYq34YaL.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/28FIqAkTgmOzPzBYq34YaL
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T12:47:07Z
additional property: OTSCanonicalRecord
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. 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 0x7747a91e154a478979cdec861e785a2d64c0e22d63a005d2e0e346418ac08c74. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/28FIqAkTgmOzPzBYq34YaL.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/28FIqAkTgmOzPzBYq34YaL.
  date published: 2026-06-13T12:47:07Z

City Boy
type: MusicRecording
duration: PT3M23S
duration ms: 203506
explicit: false
by artist: Calpurnia
in album: Scout
  type: MusicAlbum
  date published: 2018-06-15
isrc code: CAUM81800075
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-05T08:30:26+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4226828384465dc1acf35cc340f66dce7cf0744b4f7f01db0be43de5c579d870
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953513
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/953513
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/track/3nJWtOHiTGDLVBYhbIjG7v.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3nJWtOHiTGDLVBYhbIjG7v
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T12:47:07Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4226828384465dc1acf35cc340f66dce7cf0744b4f7f01db0be43de5c579d870","isrc":"CAUM81800075","name":"City Boy","registered_at":"2026-06-05T08:30:26Z","spotify_id":"3nJWtOHiTGDLVBYhbIjG7v","type":"track"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. 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 0x4226828384465dc1acf35cc340f66dce7cf0744b4f7f01db0be43de5c579d870. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3nJWtOHiTGDLVBYhbIjG7v.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3nJWtOHiTGDLVBYhbIjG7v.
  date published: 2026-06-13T12:47:07Z
  text: {"copyright_id":"0x4226828384465dc1acf35cc340f66dce7cf0744b4f7f01db0be43de5c579d870","isrc":"CAUM81800075","name":"City Boy","registered_at":"2026-06-05T08:30:26Z","spotify_id":"3nJWtOHiTGDLVBYhbIjG7v","type":"track"}

Blame
type: MusicRecording
duration: PT3M27S
duration ms: 207720
explicit: false
by artist: Calpurnia
in album: Scout
  type: MusicAlbum
  date published: 2018-06-15
isrc code: CAUM81800079
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-05T06:50:33+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x47c6f2e840f92d23a0530edf9bb10f1a040b0a40da719bcba27d91a81d8201fb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953513
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/953513
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/track/6d754cEpS3lAElWhmRqG0Z.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6d754cEpS3lAElWhmRqG0Z
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T12:47:07Z
additional property: OTSCanonicalRecord
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. 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 0x47c6f2e840f92d23a0530edf9bb10f1a040b0a40da719bcba27d91a81d8201fb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6d754cEpS3lAElWhmRqG0Z.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6d754cEpS3lAElWhmRqG0Z.
  date published: 2026-06-13T12:47:07Z

Waves
type: MusicRecording
duration: PT6M40S
duration ms: 400533
explicit: false
by artist: Calpurnia
in album: Scout
  type: MusicAlbum
  date published: 2018-06-15
isrc code: CAUM81800080
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-06T17:04:31+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfccf74a6e04d9b9abf43da394dfce78d6d5a6d797dd5c0f335dbd95d11775f8d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953515
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/953515
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/track/0uMMNfcxbevRIY1FB3UoZw.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0uMMNfcxbevRIY1FB3UoZw
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T12:53:06Z
additional property: OTSCanonicalRecord
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. 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 0xfccf74a6e04d9b9abf43da394dfce78d6d5a6d797dd5c0f335dbd95d11775f8d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0uMMNfcxbevRIY1FB3UoZw.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0uMMNfcxbevRIY1FB3UoZw.
  date published: 2026-06-13T12:53:06Z

Cell
type: MusicRecording
duration: PT3M15S
duration ms: 195320
explicit: false
by artist: Calpurnia
in album: Cell
  type: MusicAlbum
  date published: 2019-03-06
isrc code: CAUM81900016
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-05T12:17:36+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5650e4e291f0e6c7e6a0dfdbfc1890f1ec909c87dc3ef1ed0dd42a651767db32
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953536
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/953536
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/track/7DoYvD1nsLBr6vIpa2AT07.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7DoYvD1nsLBr6vIpa2AT07
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T17:25:41Z
additional property: OTSCanonicalRecord
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. 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 0x5650e4e291f0e6c7e6a0dfdbfc1890f1ec909c87dc3ef1ed0dd42a651767db32. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7DoYvD1nsLBr6vIpa2AT07.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7DoYvD1nsLBr6vIpa2AT07.
  date published: 2026-06-13T17:25:41Z

Wasting Time - Recorded At Spotify Studios NYC
type: MusicRecording
duration: PT2M25S
duration ms: 145280
explicit: false
by artist: Calpurnia
in album: Spotify Singles
  type: MusicAlbum
  date published: 2018-09-19
isrc code: CAUM81800209
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-08T10:33:27+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd4422e31c291b1a816607d2672fa7c7882a69bb0c3490087b8cea715eabf65b7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953520
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/953520
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/track/5ff5WH1b1Te2PpVwLX9p96.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5ff5WH1b1Te2PpVwLX9p96
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T13:32:09Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd4422e31c291b1a816607d2672fa7c7882a69bb0c3490087b8cea715eabf65b7","isrc":"CAUM81800209","name":"Wasting Time - Recorded At Spotify Studios NYC","registered_at":"2026-06-08T10:33:27Z","spotify_id":"5ff5WH1b1Te2PpVwLX9p96","type":"track"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. 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 0xd4422e31c291b1a816607d2672fa7c7882a69bb0c3490087b8cea715eabf65b7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5ff5WH1b1Te2PpVwLX9p96.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5ff5WH1b1Te2PpVwLX9p96.
  date published: 2026-06-13T13:32:09Z
  text: {"copyright_id":"0xd4422e31c291b1a816607d2672fa7c7882a69bb0c3490087b8cea715eabf65b7","isrc":"CAUM81800209","name":"Wasting Time - Recorded At Spotify Studios NYC","registered_at":"2026-06-08T10:33:27Z","spotify_id":"5ff5WH1b1Te2PpVwLX9p96","type":"track"}

Say It Ain't So - Recorded At Spotify Studios NYC
type: MusicRecording
duration: PT4M3S
duration ms: 243053
explicit: false
by artist: Calpurnia
in album: Spotify Singles
  type: MusicAlbum
  date published: 2018-09-19
isrc code: CAUM81800210
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-04T07:36:57+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x02425d57605c2329dbd6aa5f5ec20049fc4606ff9534a04660b75334bea12f5d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953536
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/953536
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/track/4NBSkqCopxDtoMNABwtsce.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4NBSkqCopxDtoMNABwtsce
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T17:25:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x02425d57605c2329dbd6aa5f5ec20049fc4606ff9534a04660b75334bea12f5d","isrc":"CAUM81800210","name":"Say It Ain't So - Recorded At Spotify Studios NYC","registered_at":"2026-06-04T07:36:57Z","spotify_id":"4NBSkqCopxDtoMNABwtsce","type":"track"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. 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 0x02425d57605c2329dbd6aa5f5ec20049fc4606ff9534a04660b75334bea12f5d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4NBSkqCopxDtoMNABwtsce.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4NBSkqCopxDtoMNABwtsce.
  date published: 2026-06-13T17:25:41Z
  text: {"copyright_id":"0x02425d57605c2329dbd6aa5f5ec20049fc4606ff9534a04660b75334bea12f5d","isrc":"CAUM81800210","name":"Say It Ain't So - Recorded At Spotify Studios NYC","registered_at":"2026-06-04T07:36:57Z","spotify_id":"4NBSkqCopxDtoMNABwtsce","type":"track"}

Louie
type: MusicRecording
duration: PT2M59S
duration ms: 179573
explicit: false
by artist: Calpurnia
in album: Scout
  type: MusicAlbum
  date published: 2018-06-15
isrc code: CAUM81800076
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-08T03:04:50+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1a6f9b4b5cb378eca31c4ab999bd0794a54ac225f5993ed94b6caa94da7f9bc1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953528
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/953528
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/track/3pWx8xu9e1F0rW89hGq51i.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3pWx8xu9e1F0rW89hGq51i
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T15:41:10Z
additional property: OTSCanonicalRecord
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. 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 0x1a6f9b4b5cb378eca31c4ab999bd0794a54ac225f5993ed94b6caa94da7f9bc1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3pWx8xu9e1F0rW89hGq51i.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3pWx8xu9e1F0rW89hGq51i.
  date published: 2026-06-13T15:41:10Z

Wasting Time
type: MusicRecording
duration: PT2M9S
duration ms: 129053
explicit: false
by artist: Calpurnia
in album: Scout
  type: MusicAlbum
  date published: 2018-06-15
isrc code: CAUM81800077
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-07T13:16:35+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x98fba760e18eba34e89736dcfcf3bd78a0303f2da411688d720d9a2af92446b2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953515
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/953515
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/track/14PSNGPO5qD04OWgeKAy11.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/14PSNGPO5qD04OWgeKAy11
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T12:53:06Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x98fba760e18eba34e89736dcfcf3bd78a0303f2da411688d720d9a2af92446b2","isrc":"CAUM81800077","name":"Wasting Time","registered_at":"2026-06-07T13:16:35Z","spotify_id":"14PSNGPO5qD04OWgeKAy11","type":"track"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. 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 0x98fba760e18eba34e89736dcfcf3bd78a0303f2da411688d720d9a2af92446b2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/14PSNGPO5qD04OWgeKAy11.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/14PSNGPO5qD04OWgeKAy11.
  date published: 2026-06-13T12:53:06Z
  text: {"copyright_id":"0x98fba760e18eba34e89736dcfcf3bd78a0303f2da411688d720d9a2af92446b2","isrc":"CAUM81800077","name":"Wasting Time","registered_at":"2026-06-07T13:16:35Z","spotify_id":"14PSNGPO5qD04OWgeKAy11","type":"track"}

Greyhound
type: MusicRecording
duration: PT4M48S
duration ms: 288240
explicit: false
by artist: Calpurnia
in album: Scout
  type: MusicAlbum
  date published: 2018-06-15
isrc code: CAUM81800078
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-04T16:00:26+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7747a91e154a478979cdec861e785a2d64c0e22d63a005d2e0e346418ac08c74
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953513
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/953513
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/track/28FIqAkTgmOzPzBYq34YaL.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/28FIqAkTgmOzPzBYq34YaL
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T12:47:07Z
additional property: OTSCanonicalRecord
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. 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 0x7747a91e154a478979cdec861e785a2d64c0e22d63a005d2e0e346418ac08c74. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/28FIqAkTgmOzPzBYq34YaL.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/28FIqAkTgmOzPzBYq34YaL.
  date published: 2026-06-13T12:47:07Z

City Boy
type: MusicRecording
duration: PT3M23S
duration ms: 203506
explicit: false
by artist: Calpurnia
in album: Scout
  type: MusicAlbum
  date published: 2018-06-15
isrc code: CAUM81800075
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-05T08:30:26+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4226828384465dc1acf35cc340f66dce7cf0744b4f7f01db0be43de5c579d870
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953513
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block/953513
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/track/3nJWtOHiTGDLVBYhbIjG7v.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3nJWtOHiTGDLVBYhbIjG7v
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T12:47:07Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4226828384465dc1acf35cc340f66dce7cf0744b4f7f01db0be43de5c579d870","isrc":"CAUM81800075","name":"City Boy","registered_at":"2026-06-05T08:30:26Z","spotify_id":"3nJWtOHiTGDLVBYhbIjG7v","type":"track"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. 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
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Blame
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subject of: OpenTimestamps Proof of Existence
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Waves
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subject of: OpenTimestamps Proof of Existence
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Say It Ain't So - Recorded At Spotify Studios NYC
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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