Sarah Caldwell
type: MusicGroup
description: Sarah Caldwell (March 6, 1924March 23, 2006) was an American opera conductor, impresario, and stage director. Early life Caldwell was born in Maryville, Missouri, and grew up in Fayetteville, Arka
popularity: 5
followers: 43
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0a7090c9a9dcac253156ac0f7a25ad00aad9abe136c28a1f47992d5081917d9a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953879
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953879
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/09a71114-b454-4b8b-9c1f-2e5145c322eb.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/09a71114-b454-4b8b-9c1f-2e5145c322eb.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/09a71114-b454-4b8b-9c1f-2e5145c322eb
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T02:57:35Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0a7090c9a9dcac253156ac0f7a25ad00aad9abe136c28a1f47992d5081917d9a","name":"Sarah Caldwell","registered_at":"2026-06-15T16:51:36Z","symbol":"NIM0771167","token_address":"0xe9a8619b073342bacc75a45482319eb81f304753","type":"artist","uuid":"09a71114-b454-4b8b-9c1f-2e5145c322eb"}
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 0x0a7090c9a9dcac253156ac0f7a25ad00aad9abe136c28a1f47992d5081917d9a. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09a71114-b454-4b8b-9c1f-2e5145c322eb.json and https://artists.proofprofile.net/proofs/artist/09a71114-b454-4b8b-9c1f-2e5145c322eb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:28:01Z
  text: {"copyright_id":"0x0a7090c9a9dcac253156ac0f7a25ad00aad9abe136c28a1f47992d5081917d9a","name":"Sarah Caldwell","registered_at":"2026-06-15T16:51:36Z","symbol":"NIM0771167","token_address":"0xe9a8619b073342bacc75a45482319eb81f304753","type":"artist","uuid":"09a71114-b454-4b8b-9c1f-2e5145c322eb"}
album: Simply Opera
  type: MusicAlbum
  date published: 2016-03-18