Orchestra of the San Carlos Opera House, Lisbon
type: MusicGroup
genre: opera
popularity: 12
followers: 17
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3c97e9bbfbf0d10893e4dd2787da4bec7897b0656b5050dec0b014980482fad1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953645
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953645
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3fc98745-aa8d-49bc-81fb-93f1688789b4.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3fc98745-aa8d-49bc-81fb-93f1688789b4.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3fc98745-aa8d-49bc-81fb-93f1688789b4
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T14:31:42Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3c97e9bbfbf0d10893e4dd2787da4bec7897b0656b5050dec0b014980482fad1","name":"Orchestra of the San Carlos Opera House, Lisbon","registered_at":"2026-06-14T11:10:54Z","symbol":"NIM0434510","token_address":"0x2d54c916876f3806846ee65ad87601bcede67bc9","type":"artist","uuid":"3fc98745-aa8d-49bc-81fb-93f1688789b4"}
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 0x3c97e9bbfbf0d10893e4dd2787da4bec7897b0656b5050dec0b014980482fad1. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fc98745-aa8d-49bc-81fb-93f1688789b4.json and https://artists.proofprofile.net/proofs/artist/3fc98745-aa8d-49bc-81fb-93f1688789b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T15:20:52Z
  text: {"copyright_id":"0x3c97e9bbfbf0d10893e4dd2787da4bec7897b0656b5050dec0b014980482fad1","name":"Orchestra of the San Carlos Opera House, Lisbon","registered_at":"2026-06-14T11:10:54Z","symbol":"NIM0434510","token_address":"0x2d54c916876f3806846ee65ad87601bcede67bc9","type":"artist","uuid":"3fc98745-aa8d-49bc-81fb-93f1688789b4"}
track: La traviata, Act III Scene 4: No. 8c. "Addio, del passato" (Violetta) [Recorded in Lisbon, 1958]

La traviata, Act III Scene 4: No. 8c. "Addio, del passato" (Violetta) [Recorded in Lisbon, 1958]
type: MusicRecording
duration: PT3M24S
duration ms: 204226
explicit: false
by artist: Maria Callas
by artist: Orchestra of the San Carlos Opera House, Lisbon
by artist: Franco Ghione
in album: Maria by Callas (Original Motion Picture Soundtrack)
  type: MusicAlbum
  date published: 2018-02-23
isrc code: FR9W15800117
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-08T03:58:06+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x214f5ff8ab2a837d3f3b921390799e9c5255c0c0dfee4391bde5bc29afe84bbc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953520
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953520
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W15800117
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T13:32:09+00:00
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 953520
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-06-13T13:32:09+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214f5ff8ab2a837d3f3b921390799e9c5255c0c0dfee4391bde5bc29afe84bbc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W15800117.
  date published: 2026-06-13T17:25:41Z
audio: La traviata, Act III Scene 4: No. 8c. "Addio, del passato" (Violetta) [Recorded in Lisbon, 1958]
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 107.68
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.324
  additional property: Energy
    type: PropertyValue
    value: 0.139
  additional property: Speechiness
    type: PropertyValue
    value: 0.062
  additional property: Acousticness
    type: PropertyValue
    value: 0.96
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.003
  additional property: Liveness
    type: PropertyValue
    value: 0.871
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.098
  additional property: Loudness (dB)
    type: PropertyValue
    value: -19.56
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Minor