Numberock
type: MusicGroup
popularity: 25
followers: 3402
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a333524c-b081-4e9c-862d-6b33506cedf8.ots
additional property: OTSRecordURL
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  value: https://artists.proofprofile.net/proofs/artist/a333524c-b081-4e9c-862d-6b33506cedf8.json
additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a333524c-b081-4e9c-862d-6b33506cedf8
additional property: OTSTimestamp
  type: PropertyValue
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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 0xbb58d6e5022bf850b0cb38fa89f7361bbcc03dc32d0c99baa92a69f58cbb4f3b. 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/a333524c-b081-4e9c-862d-6b33506cedf8.json and https://artists.proofprofile.net/proofs/artist/a333524c-b081-4e9c-862d-6b33506cedf8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:28:13Z
album: Let's Rock Math!
  type: MusicAlbum
  date published: 2015-10-30
album: Types of Angles Song for Kids
  type: MusicAlbum
  date published: 2019-10-12
  track: Types of Angles Song for Kids
    type: MusicRecording
    duration: PT1M40S
    duration ms: 100806
    explicit: false
    by artist: Numberock
    in album: Types of Angles Song for Kids
      type: MusicAlbum
      date published: 2019-10-12
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    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
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    additional property: CopyrightChainExplorerURL
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    additional property: OTSHash
    additional property: OTSBitcoinBlock
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956725
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN71985026
    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 0xe9357297d4c945f2825120c31c142142e5923f30b8010963aed7050e0c4955ef. 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/QZHN71985026.
      date published: 2026-07-05T01:12:41Z
    audio: Types of Angles Song for Kids
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      additional property: Tempo (BPM)
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      additional property: Musical Key
        type: PropertyValue
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      additional property: Mode (Major/Minor)
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      additional property: Time Signature
        type: PropertyValue
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      additional property: Danceability
        type: PropertyValue
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      additional property: Energy
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      additional property: Speechiness
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      additional property: Acousticness
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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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album: Adding and Subtracting Fractions
  type: MusicAlbum
  date published: 2019-10-12
album: Adding and Subtracting Decimals
  type: MusicAlbum
  date published: 2019-10-12
album: Classifying 3d Shapes
  type: MusicAlbum
  date published: 2019-10-12
album: Anti-Bullying Song for Kids
  type: MusicAlbum
  date published: 2019-10-12
album: Area Model Multiplication
  type: MusicAlbum
  date published: 2019-10-12
album: 3d Shapes Song
  type: MusicAlbum
  date published: 2019-10-12
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    type: MusicRecording
    duration: PT4M23S
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    by artist: Numberock
    in album: 3d Shapes Song
      type: MusicAlbum
      date published: 2019-10-12
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    additional property: CopyrightStatus
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    additional property: CopyrightRegisteredAt
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    additional property: OTSBitcoinBlock
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
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    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN71979289
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T12:00:27Z
    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 0x3d3c34398b05f414a56f0327fcd47390be0e4c14a599adf8a942de614eccbb77. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZHN71979289.
      date published: 2026-07-15T12:00:27Z
    audio: 3d Shapes Song
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
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      additional property: Musical Key
        type: PropertyValue
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      additional property: Mode (Major/Minor)
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      additional property: Time Signature
        type: PropertyValue
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      additional property: Danceability
        type: PropertyValue
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      additional property: Energy
        type: PropertyValue
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      additional property: Speechiness
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
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album: Equivalent Fractions
album: Capacity: Liquid Volume Song
album: Converting Fractions to Decimals
album: Christmas Around the World
album: Counting Coins for Kids
album: Converting Decimals to Percents
album: Coordinate Plane Song
album: Coordinate Plane: 4 Quadrants
album: 2 Times Tables Dance Song
album: Reduce, Reuse, Recycle Song
album: Skip Counting by 100 Song
album: Fractions Song
album: Skip Counting by 9 Song for Kids
album: Long Division
album: Integers Song
album: Growth Mindset Song for Kids
album: Dividing Fractions by Whole Numbers
album: 3 Times Tables Song for Kids
album: Comparing Numbers to 100
album: Skip Counting by 5 Song for Kids
album: Metric System Song for Kids: Expanded Prefixes
album: Counting to 100 in Chinese
album: Skip Counting by 10 Song
album: Months of the Year Song for Kids
album: Input-Output Tables Song
album: Fractions on a Number Line
album: 11 Times Tables Dance Song
album: Even & Odd Numbers Song
album: Inches, Feet, & Yards Song
album: 6 Times Tables Song for Kids
album: 2-Digit Addition With Regrouping
album: Less Than Greater Than Song
album: Long Division Song
album: Lines of Symmetry
album: Counting to 10 in Chinese
album: 9 Times Tables Dance Song
album: Counting to 10 in English
album: Halloween Night Song
album: Long Division Song With 2-Digit Divisors
album: 12 Times Tables Dance Song
album: Skip Counting by 8 Song for Kids
album: Dividing Fractions: Keep, Change, Flip
album: Skip Counting by 5 Song
album: Skip Counting by 7 Song for Kids
album: Lines Song: Parallel, Perpendicular, and Intersecting
album: Hindi Ginti: Counting to 10 in Hindi
album: Dividing Whole Numbers by Fractions
album: 5 Times Tables Song for Kids
album: 7 Times Tables Dance Song
album: Martin Luther King Jr. Song for Kids
album: Counting to 10 in French
album: Counting to 10 in Spanish
album: 8 Times Tables Dance Song
album: Multi-Digit Multiplication
album: Metric System Song
album: Counting to 100 in Arabic
album: Skip Counting by 6 Song

Speechiness
type: PropertyValue
value: 0.113

Acousticness
type: PropertyValue
value: 0.403

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.155

Valence (Positivity)
type: PropertyValue
value: 0.813

Loudness (dB)
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value: -9.225

Key Name
type: PropertyValue
value: A

Mode Name
type: PropertyValue
value: Major

Equivalent Fractions
type: MusicAlbum
date published: 2019-10-12

Capacity: Liquid Volume Song
type: MusicAlbum
date published: 2019-10-12

Converting Fractions to Decimals
type: MusicAlbum
date published: 2019-10-19

Christmas Around the World
type: MusicAlbum
date published: 2019-10-19

Counting Coins for Kids
type: MusicAlbum
date published: 2019-10-19

Converting Decimals to Percents
type: MusicAlbum
date published: 2019-10-19

Coordinate Plane Song
type: MusicAlbum
date published: 2019-10-19

Coordinate Plane: 4 Quadrants
type: MusicAlbum
date published: 2019-10-19

2 Times Tables Dance Song
type: MusicAlbum
date published: 2019-10-20

Reduce, Reuse, Recycle Song
type: MusicAlbum
date published: 2019-10-20

Skip Counting by 100 Song
type: MusicAlbum
date published: 2019-10-20

Fractions Song
type: MusicAlbum
date published: 2019-10-20

Skip Counting by 9 Song for Kids
type: MusicAlbum
date published: 2019-10-20

Long Division
type: MusicAlbum
date published: 2019-10-20

Integers Song
type: MusicAlbum
date published: 2019-10-20

Growth Mindset Song for Kids
type: MusicAlbum
date published: 2019-10-20

Dividing Fractions by Whole Numbers
type: MusicAlbum
date published: 2019-10-20

3 Times Tables Song for Kids
type: MusicAlbum
date published: 2019-10-20
track: 3 Times Tables Song for Kids
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  duration: PT2M32S
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  by artist: Numberock
  in album: 3 Times Tables Song for Kids
    type: MusicAlbum
    date published: 2019-10-20
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  additional property: CopyrightID
  additional property: CopyrightStatus
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  additional property: CopyrightRegisteredAt
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  additional property: CopyrightChainExplorerURL
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  additional property: OTSBitcoinBlock
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  additional property: OTSBitcoinBlockVerifyURL
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN81942970
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-18T12:14:37Z
  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 0x4842c0d83e0147f7971d874c415f9a066623ecf28e5e9cbeaa7da75b3b6653c7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN81942970.
    date published: 2026-07-18T12:14:37Z
  audio: 3 Times Tables Song for Kids
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Musical Key
      type: PropertyValue
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
      type: PropertyValue
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    additional property: Danceability
      type: PropertyValue
      value: 0.765
    additional property: Energy
      type: PropertyValue
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    additional property: Speechiness
      type: PropertyValue
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    additional property: Acousticness
      type: PropertyValue
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    additional property: Instrumentalness
      type: PropertyValue
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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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Comparing Numbers to 100
type: MusicAlbum
date published: 2019-10-20

Skip Counting by 5 Song for Kids
type: MusicAlbum
date published: 2019-10-20

Metric System Song for Kids: Expanded Prefixes
type: MusicAlbum
date published: 2019-10-20

Counting to 100 in Chinese
type: MusicAlbum
date published: 2019-10-20

Skip Counting by 10 Song
type: MusicAlbum
date published: 2019-10-20

Months of the Year Song for Kids
type: MusicAlbum
date published: 2019-10-20

Input-Output Tables Song
type: MusicAlbum
date published: 2019-10-20

Fractions on a Number Line
type: MusicAlbum
date published: 2019-10-20

11 Times Tables Dance Song
type: MusicAlbum
date published: 2019-10-20

Even & Odd Numbers Song
type: MusicAlbum
date published: 2019-10-20

Inches, Feet, & Yards Song
type: MusicAlbum
date published: 2019-10-20

6 Times Tables Song for Kids
type: MusicAlbum
date published: 2019-10-20
track: 6 Times Tables Song for Kids
  type: MusicRecording
  duration: PT2M39S
  duration ms: 159973
  explicit: false
  by artist: Numberock
  in album: 6 Times Tables Song for Kids
    type: MusicAlbum
    date published: 2019-10-20
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  additional property: CopyrightStatus
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  additional property: CopyrightChainExplorerURL
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  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958211
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958211
  additional property: OTSVerificationAPI
    type: PropertyValue
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  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-15T23:24:33Z
  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 0x9e67a37dab7447ec87240dc7774d4f742985ee6df05c3061aa3b5042a17c603d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZHN81943587.
    date published: 2026-07-15T23:24:33Z
  audio: 6 Times Tables Song for Kids
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Musical Key
      type: PropertyValue
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
      type: PropertyValue
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    additional property: Danceability
      type: PropertyValue
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    additional property: Energy
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    additional property: Speechiness
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    additional property: Acousticness
      type: PropertyValue
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    additional property: Instrumentalness
      type: PropertyValue
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    additional property: Liveness
      type: PropertyValue
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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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2-Digit Addition With Regrouping
type: MusicAlbum
date published: 2019-10-20

Less Than Greater Than Song
type: MusicAlbum
date published: 2019-10-20

Long Division Song
type: MusicAlbum
date published: 2019-10-20

Lines of Symmetry
type: MusicAlbum
date published: 2019-10-20

Counting to 10 in Chinese
type: MusicAlbum
date published: 2019-10-20

9 Times Tables Dance Song
type: MusicAlbum
date published: 2019-10-20
track: 9 Times Tables Dance Song
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  duration: PT3M9S
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  explicit: false
  by artist: Numberock
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    type: MusicAlbum
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  additional property: CopyrightStatus
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  additional property: CopyrightRegisteredAt
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  additional property: OTSHash
  additional property: OTSBitcoinBlock
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  additional property: OTSBitcoinBlockVerifyURL
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  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 0x2e3093d8f9782270d6ca109cf0806eeb6567f961fdc33d66c3c615f5b66848fd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN81945527.
    date published: 2026-07-03T21:18:05Z
  audio: 9 Times Tables Dance Song
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    additional property: Tempo (BPM)
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    additional property: Musical Key
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
      type: PropertyValue
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    additional property: Danceability
      type: PropertyValue
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    additional property: Energy
      type: PropertyValue
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    additional property: Speechiness
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    additional property: Acousticness
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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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Counting to 10 in English
type: MusicAlbum
date published: 2019-10-20

Halloween Night Song
type: MusicAlbum
date published: 2019-10-20

Long Division Song With 2-Digit Divisors
type: MusicAlbum
date published: 2019-10-20

12 Times Tables Dance Song
type: MusicAlbum
date published: 2019-10-20
track: 12 Times Tables Dance Song
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  additional property: OTSTimestamp
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  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
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    date published: 2026-07-18T16:47:25Z
  audio: 12 Times Tables Dance Song
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Skip Counting by 8 Song for Kids
type: MusicAlbum
date published: 2019-10-20

Dividing Fractions: Keep, Change, Flip
type: MusicAlbum
date published: 2019-10-20

Skip Counting by 5 Song
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date published: 2019-10-20
track: Skip Counting by 5 Song
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
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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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108369c6c99a5374ab7a1f6614cc236a7badb481d147a35d39c8354377865fcf. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHN81939344.
    date published: 2026-07-03T04:03:57Z
  audio: Skip Counting by 5 Song
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    additional property: Danceability
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Skip Counting by 7 Song for Kids
type: MusicAlbum
date published: 2019-10-20

Lines Song: Parallel, Perpendicular, and Intersecting
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date published: 2019-10-20
track: Lines Song: Parallel, Perpendicular, and Intersecting
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  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
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    date published: 2026-07-19T18:08:19Z
  audio: Lines Song: Parallel, Perpendicular, and Intersecting
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Hindi Ginti: Counting to 10 in Hindi
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date published: 2019-10-20

Dividing Whole Numbers by Fractions
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date published: 2019-10-20

5 Times Tables Song for Kids
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date published: 2019-10-20
track: 5 Times Tables Song for Kids
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  additional property: OTSVerifyInstructions
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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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
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    date published: 2026-07-20T21:15:01Z
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7 Times Tables Dance Song
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date published: 2019-10-20
track: 7 Times Tables Dance Song
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-15T10:33:22Z
  audio: 7 Times Tables Dance Song
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Martin Luther King Jr. Song for Kids
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date published: 2019-10-20

Counting to 10 in French
type: MusicAlbum
date published: 2019-10-20

Counting to 10 in Spanish
type: MusicAlbum
date published: 2019-10-20

8 Times Tables Dance Song
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date published: 2019-10-20
track: 8 Times Tables Dance Song
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    date published: 2019-10-20
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-05T01:12:41Z
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Multi-Digit Multiplication
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date published: 2019-10-20

Metric System Song
type: MusicAlbum
date published: 2019-10-20

Counting to 100 in Arabic
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date published: 2019-10-20

Skip Counting by 6 Song
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date published: 2019-10-20

Skip Counting by 2 Song for Kids
type: MusicAlbum
date published: 2019-10-20

Perimeter and Area Song
type: MusicAlbum
date published: 2019-10-21

Writing & Interpreting Numerical Expressions
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date published: 2019-10-21

Place Value Song for Kids
type: MusicAlbum
date published: 2019-10-21

Telling Time to the Nearest Hour
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date published: 2019-10-21

Ten Frame Song
type: MusicAlbum
date published: 2019-10-21

Simplifying Fractions Song
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date published: 2019-10-21

Rounding Numbers Song
type: MusicAlbum
date published: 2019-10-21

Telling Time to the Nearest Minute
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date published: 2019-10-21

Test Prep Song | Math Test Taking Strategies
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date published: 2019-10-21

Multiplying Fractions by Whole Numbers
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date published: 2019-10-21

Counting to 100 in Spanish
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date published: 2019-10-21
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Multiplying Decimals Song
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Quadrilaterals: Shapes Song for Kids
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Multiplying Fractions
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Triangles Song
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Valentine's Day Song for Kids
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Subtraction With Regrouping
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4 Times Tables Song for Kids
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Ounces, Pounds, and Tons Song
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Order of Operations Song
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The US Presidents in Chronological Order
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Polygons Song
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Thanksgiving Day History Song
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Rounding Decimals Song
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Ordering Decimals
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Counting to 100 in English
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Addition With Regrouping Song
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Units of Time Song
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Telling Time to the Nearest 5 Minutes
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Prime Numbers & Composite Numbers
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Comparing Decimals Song
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Counting to 100 in Portuguese Song
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Canción de las Monedas | US Coins in Spanish
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Transformations Math Song
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US Presidents in Order Song | To Biden
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Multiplication as Repeated Addition Song
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Multiplying Mixed Numbers Song
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The Powers of Ten: An Intro to Exponents Song
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Skip Counting by 10 and the Ten Times Tables Song
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Redondear Numeros Enteros Canción | Spanish Math Song
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Canción de los Ángulos: Rectos, Agudos, y Obtusos
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The Properties of Multiplication Song
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Addition and Subtraction Song | Word Problems and Number Sentences
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Tipos de Lineas | Paralelas, Secantes, y Perpendiculares
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Redondear Números Decimales: | Spanish Rounding Numbers Song
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Valor Posicional Para Niños
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Summer Vacation Song for End of the School Year
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Number Lines Song
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Improper Fractions and Mixed Numbers Song
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I Can Show Numbers in So Many Ways Song
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Measurement Song for Kids | Comparing Measurements
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Longer vs Shorter Song for Kids
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Counting to 20 Song
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Relating Fractions to Decimals Song
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The Money Song for Kids
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Algebra Song | Introduction to Variables
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Bar Graphs and Picture Graphs Song
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Decimal Place Value Song
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Division Song
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Line Plots Song for Kids
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Comparing Fractions Song
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Addition Song | Mentally Adding by 10 and 100
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Line Plots with Fractions Song
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Our Mother Earth: An Earth Day Rap (Special Version)
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Addition & Subtraction Fact Families Song
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Contar de a 5: Cancion Para Niños
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Contar del 1 al 20 | Cancion Para Niños
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Australian Coins and Money Song for Kids
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Canadian Coins and Money Song for Kids
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Decir la Hora Para Niños
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UK Coins and Money Song for Kids
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Counting From One to Five Song For Kids
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Addition and Subtraction Song
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The Chess Song | How to Play Chess for Kids
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Formas 3D: Las Formas Geométricas
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Canción de Fracciones Para Niños
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Canción de Resta Con Llevada Dos Cifras
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Subtraction Facts Song
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Adding Mixed Numbers Song
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Doubles Addition Facts Song
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Shape Patterns Song
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Place Value and Expanded Form Song
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Unicorn Freeze Dance Song
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Shapes Song
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Tablas de Entrada y Salida: Canción Matemática
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Place Value to the Millions Song
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Addition Facts Song
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Times Tables Songs
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Compter jusqu’à 100
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Skip Counting by 6 | 6 Times Tables (Extended Version)
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Number Lines (Extended Version)
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Transformations (Extended Version)
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Ten Frame Song (Extended Version)
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Graphing Song
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Solving Equations Song | One-Step
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Place Value to the Millions with Expanded Form
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2-Digit by 1-Digit Multiplication Song with Partial Products
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Ratios Song | Musical Math for MIddle School
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Multiplication Song | Multiply by Multiples of 10
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The Protractor Song
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Counting From 1 to 10
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Circumference: Diameter Times Pi Song
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US Presidents in Order Song | To Trump's 2nd Term
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Earth Day Rap: Reduce, Reuse, Recycle
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