thumb|upright 0.8|Golda Schultz in 2021 Golda Schultz is a South African soprano. Early life and education Golda Schultz, daughter of a mathematics professor, grew up in Bloemfontein. She studied
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549d4f1a09aa2fe89e2ceffb1164bdd19c4c8edb8279027a6f5bcd8d87e55857. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a324e8b-2693-4c6d-a3ad-3ff4f626bf51.json and https://artists.proofprofile.net/proofs/artist/4a324e8b-2693-4c6d-a3ad-3ff4f626bf51.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Don Giovanni, K.527, Act I: Quartetto. "Non ti fidar, o misera, di quel ribaldo cor!"
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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb6db2b339b996f4d4e9c607be758cb932d5a55d31df1e393f6b7228dc0aba3. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR50X2302601.
Don Giovanni, K.527, Act I: Recitativo accompagnato. "Don Ottavio, son morta!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff3dbf364ba96ebb6e1b13f487b7a3129247f71f2f262e04b8047ade00d3519. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR50X2302602.
Don Giovanni, K.527, Act I: Aria. "Or sai chi l"onore"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ce239d37edfa82782a550bb7b764b94eaad55240d5f1095c135f9421c04d27. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/FR50X2302603.
Le nozze di Figaro, K.492, Act IV: Recitativo. "Giunse alfin il momento"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf6da7050020b6082a4a4c9c57f8b4737b1bb730dbc44862585687c9fcaf66a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR50X2302604.
Le nozze di Figaro, K.492, Act IV: Aria. "Deh vieni non tardar"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e84f8da068ac3920a1e800ea354596be2f02132e669b538c39faf24da1e4091. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/FR50X2302605.
Così fan tutte, K.588, Act I: Recitativo. "Temerari, sortite fuori di questo loco!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ac47c518119f090dee9eb0f132c21960c8708858a39f81c96311edb0393f5e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR50X2302606.
Così fan tutte, K.588, Act I: Aria. "Come scoglio immoto resta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5401519bc4bdda5519a71708e6b2c390d170f818915d479ad1d27bd8e0c8b468. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR50X2302607.
Così fan tutte, K.588, Act II: Duetto. "Fra gli amplessi in pochi istanti"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5cfd6d40438102256d85dcdb9264923112ac7a9e4f3696cb0933325515c9fe. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR50X2302608.
Don Giovanni, K.527, Act II: Recitativo accompagnato. "In quali eccessi, o Numi"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf157e5002c01e8da57d3b5bc5aa7a17f377d1905f55ed8efffd6f6bceda9d4. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR50X2302609.
Don Giovanni, K.527, Act II: Aria. "Mi tradì quest"alma ingrata"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fd8ca114ed340442a519e96073a100d491a209fba2d158fd68c0db99e9bb13. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR50X2302610.
Le nozze di Figaro, K.492, Act III: Duettino. "Canzonetta sull aria"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a2b13fa7885a8bec812bf7f0a527b7bb753d39944b3c631a56d23975bc98a8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR50X2302611.
Così fan tutte, K.588, Act I: Sextetto. "Alla bella Despinetta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0a2ea0e91ef41ce7ae3230c2a9eab0bff82aa1dd986aaa13292cd7d7ee8588. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FR50X2302612.
Le nozze di Figaro, K.492, Act III: Recitativo. "E Susanna non vien!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd766b4f10547c2e6c7b58fd3a1267c708a999a4604cdbbe2dae11a82ad35921b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR50X2302613.
Le nozze di Figaro, K.492, Act III: Aria. "Dove sono i bei momenti"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989a8e166f661636745d93dd6a1b7952a8c6c4eeffc84349cf7e5e1007e3b472. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FR50X2302614.