Michael Colgrass
type: MusicGroup
genre: avant-garde
genre: minimalism
description: Michael Charles Colgrass (April 22, 1932 – July 2, 2019) was an American and Canadian musician, composer, and educator. He was an associate composer of the Canadian Music Centre. Early life and educa
popularity: 3
followers: 268
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xbd97f16a411d5e9d6e217e832a123d6f248826e325997dc348b5c843f3148f23
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954533
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954533
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a735aeec-c8eb-48b5-9dbc-5a3fa438438e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a735aeec-c8eb-48b5-9dbc-5a3fa438438e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a735aeec-c8eb-48b5-9dbc-5a3fa438438e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T08:57:02Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xbd97f16a411d5e9d6e217e832a123d6f248826e325997dc348b5c843f3148f23","name":"Michael Colgrass","registered_at":"2026-06-20T07:52:43Z","symbol":"NIM1558399","token_address":"0xe5583dc5f71a0e8697394a4b0bf042ff55dff367","type":"artist","uuid":"a735aeec-c8eb-48b5-9dbc-5a3fa438438e"}
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 0xbd97f16a411d5e9d6e217e832a123d6f248826e325997dc348b5c843f3148f23. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a735aeec-c8eb-48b5-9dbc-5a3fa438438e.json and https://artists.proofprofile.net/proofs/artist/a735aeec-c8eb-48b5-9dbc-5a3fa438438e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
  text: {"copyright_id":"0xbd97f16a411d5e9d6e217e832a123d6f248826e325997dc348b5c843f3148f23","name":"Michael Colgrass","registered_at":"2026-06-20T07:52:43Z","symbol":"NIM1558399","token_address":"0xe5583dc5f71a0e8697394a4b0bf042ff55dff367","type":"artist","uuid":"a735aeec-c8eb-48b5-9dbc-5a3fa438438e"}
album: Composer's Collection: Michael Colgrass
  type: MusicAlbum
  date published: 2011-01-01
album: Composer's Collection: Michael Colgrass
  type: MusicAlbum
  date published: 2011-01-01
album: Composer's Collection: Michael Colgrass
  type: MusicAlbum
  date published: 2011-12-01
album: Michael Colgrass - Percussion Music
  type: MusicAlbum
  date published: 2012-09-03
album: Michael Colgrass: Side by Side
  type: MusicAlbum
  date published: 2019-04-16