Martha Goldstein
type: MusicGroup
description: Martha Goldstein (born Martha Svendsen; June 10, 1919 – February 14, 2014) was an American harpsichordist and pianist, who gave concerts in the United States, North Africa, the Middle East, and Europe
popularity: 4
followers: 29
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x02fe8a3fd87456ce14c2f33089454bb6c39c734c9010c2d64b271f083e0ac140
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954618
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954618
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c82e6308-c8e0-4595-bbe8-797bf6e07aaa.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c82e6308-c8e0-4595-bbe8-797bf6e07aaa.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c82e6308-c8e0-4595-bbe8-797bf6e07aaa
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T23:05:13Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x02fe8a3fd87456ce14c2f33089454bb6c39c734c9010c2d64b271f083e0ac140","name":"Martha Goldstein","registered_at":"2026-06-20T21:51:15Z","symbol":"NIM1725418","token_address":"0x9136853bd6e17cd07c101b571c4986dbcb3ce470","type":"artist","uuid":"c82e6308-c8e0-4595-bbe8-797bf6e07aaa"}
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 0x02fe8a3fd87456ce14c2f33089454bb6c39c734c9010c2d64b271f083e0ac140. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c82e6308-c8e0-4595-bbe8-797bf6e07aaa.json and https://artists.proofprofile.net/proofs/artist/c82e6308-c8e0-4595-bbe8-797bf6e07aaa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T23:05:13Z
  text: {"copyright_id":"0x02fe8a3fd87456ce14c2f33089454bb6c39c734c9010c2d64b271f083e0ac140","name":"Martha Goldstein","registered_at":"2026-06-20T21:51:15Z","symbol":"NIM1725418","token_address":"0x9136853bd6e17cd07c101b571c4986dbcb3ce470","type":"artist","uuid":"c82e6308-c8e0-4595-bbe8-797bf6e07aaa"}