MacPhail Center for Music
type: MusicGroup
description: thumb|180px|William S. MacPhail The MacPhail Center for Music is a community music school located in the Mill District of the Downtown East neighborhood of Minneapolis, Minnesota. One of the oldest an
popularity: 2
followers: 120
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb2c91cb81959b43b3c3218e6ea79ccf0e9a2abb830d0aa81ae1f9360f6c24765
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/59d5cd63-eaa6-4bfe-80d3-101350dc8974.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/59d5cd63-eaa6-4bfe-80d3-101350dc8974.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/59d5cd63-eaa6-4bfe-80d3-101350dc8974
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb2c91cb81959b43b3c3218e6ea79ccf0e9a2abb830d0aa81ae1f9360f6c24765","name":"MacPhail Center for Music","registered_at":"2026-06-16T21:14:04Z","symbol":"NIM1177496","token_address":"0xa9ac545d73abb100bb8f3ded1596dd0940c6c892","type":"artist","uuid":"59d5cd63-eaa6-4bfe-80d3-101350dc8974"}
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 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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c91cb81959b43b3c3218e6ea79ccf0e9a2abb830d0aa81ae1f9360f6c24765. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59d5cd63-eaa6-4bfe-80d3-101350dc8974.json and https://artists.proofprofile.net/proofs/artist/59d5cd63-eaa6-4bfe-80d3-101350dc8974.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xb2c91cb81959b43b3c3218e6ea79ccf0e9a2abb830d0aa81ae1f9360f6c24765","name":"MacPhail Center for Music","registered_at":"2026-06-16T21:14:04Z","symbol":"NIM1177496","token_address":"0xa9ac545d73abb100bb8f3ded1596dd0940c6c892","type":"artist","uuid":"59d5cd63-eaa6-4bfe-80d3-101350dc8974"}
album: Sing with Me: Early Childhood Music Favorites
  type: MusicAlbum
  date published: 2007-01-01
album: Sing, Play, Learn with MacPhail
  type: MusicAlbum
  date published: 2010-01-01
album: Sing Play Count! with MacPhail
  type: MusicAlbum
  date published: 2014-01-01