Concerto Amsterdam
type: MusicGroup
description: Concerto Amsterdam was a classical chamber ensemble based in the Netherlands and active during the 1960s and 1970s in both live performance and the recording studio. It was founded in 1960 by the Dutc
popularity: 17
followers: 72
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa0fcf23daa88ad04f1d49457e3e53cd05c63f017ae3a1dc801141b2ff65c5559
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953620
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953620
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1e26086d-8589-4ef4-b913-868252b8b5c9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1e26086d-8589-4ef4-b913-868252b8b5c9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1e26086d-8589-4ef4-b913-868252b8b5c9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T09:36:10Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa0fcf23daa88ad04f1d49457e3e53cd05c63f017ae3a1dc801141b2ff65c5559","name":"Concerto Amsterdam","registered_at":"2026-06-14T07:33:33Z","symbol":"NIM0382677","token_address":"0xf526820ee70cbf4710fe4f8388ead9573aed16f3","type":"artist","uuid":"1e26086d-8589-4ef4-b913-868252b8b5c9"}
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 0xa0fcf23daa88ad04f1d49457e3e53cd05c63f017ae3a1dc801141b2ff65c5559. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e26086d-8589-4ef4-b913-868252b8b5c9.json and https://artists.proofprofile.net/proofs/artist/1e26086d-8589-4ef4-b913-868252b8b5c9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T09:36:10Z
  text: {"copyright_id":"0xa0fcf23daa88ad04f1d49457e3e53cd05c63f017ae3a1dc801141b2ff65c5559","name":"Concerto Amsterdam","registered_at":"2026-06-14T07:33:33Z","symbol":"NIM0382677","token_address":"0xf526820ee70cbf4710fe4f8388ead9573aed16f3","type":"artist","uuid":"1e26086d-8589-4ef4-b913-868252b8b5c9"}