Maryanne Amacher
type: MusicGroup
genre: avant-garde
genre: experimental
genre: minimalism
description: Maryanne Amacher (February 25, 1938Note, while most sources state Amacher's birth year as 1938, she had in later years used the birth year 1943. – October 22, 2009) was an American composer and instal
popularity: 6
followers: 4483
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2a107332229d3b16ac89910308b678cfb47d37a571336db752faa36bbde82507
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c70674ca-1b1a-4995-a50d-f7fdac46480f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c70674ca-1b1a-4995-a50d-f7fdac46480f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c70674ca-1b1a-4995-a50d-f7fdac46480f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2a107332229d3b16ac89910308b678cfb47d37a571336db752faa36bbde82507","name":"Maryanne Amacher","registered_at":"2026-06-20T21:47:27Z","symbol":"NIM1720724","token_address":"0xcd99b2d8a33c52e49be5fcef85f0ee759358180b","type":"artist","uuid":"c70674ca-1b1a-4995-a50d-f7fdac46480f"}
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 0x2a107332229d3b16ac89910308b678cfb47d37a571336db752faa36bbde82507. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c70674ca-1b1a-4995-a50d-f7fdac46480f.json and https://artists.proofprofile.net/proofs/artist/c70674ca-1b1a-4995-a50d-f7fdac46480f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x2a107332229d3b16ac89910308b678cfb47d37a571336db752faa36bbde82507","name":"Maryanne Amacher","registered_at":"2026-06-20T21:47:27Z","symbol":"NIM1720724","token_address":"0xcd99b2d8a33c52e49be5fcef85f0ee759358180b","type":"artist","uuid":"c70674ca-1b1a-4995-a50d-f7fdac46480f"}
album: Petra
  type: MusicAlbum
  date published: 1991
album: Sound Characters
  type: MusicAlbum
  date published: 1999-02-16
album: Sound Characters (Making The Third Ear)
  type: MusicAlbum
  date published: 1999-02-16
album: Teo! A Sonic Sculpture
  type: MusicAlbum
  date published: 2008-08-19
album: Sound Characters 2: Making Sonic Spaces
  type: MusicAlbum
  date published: 2008-08-19
album: Petra
  type: MusicAlbum
  date published: 2019-04-12