Elizabeth Vaughan (born 12 March 1937) is a Welsh soprano, later a mezzo-soprano. Vaughan was born in Llanfyllin, Montgomeryshire, and studied at the Royal Academy of Music with Olive Groves. She mad
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 0x298ad68531be38697e3e5d4ad9dd41aa2a2147ff8742bd5ce8edfbf9fa5bc6de. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/316833f3-0c6a-449c-a199-dce2f17f530a.json and https://artists.proofprofile.net/proofs/artist/316833f3-0c6a-449c-a199-dce2f17f530a.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Haydn: Nelson Mass – Vivaldi: Gloria – Handel: Zadok the Priest
Gloria, RV 589: I. Gloria in excelsis Deo
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 0x4b367cec3f0525ecebccbb860dfdf2c06e0fdcc9b5380ea60cef09f8a52f5f91. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076640001 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9b4779f22bc0f9b680a4431be96d4191efa2cee87286cd02e929c5314141b3. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076640003 — a six-check JSON result.
Magnificat (Formerly Attrib. Pergolesi): Magnificat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944c0765c4447bf355f2a28a079862914206e5faca4ce051ec989b6889084c71. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076610651 — a six-check JSON result.
Magnificat (Formerly Attrib. Pergolesi): Et misericordia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043ca22736cb84df9e4ee42471496737606ed9fbc2066206e070156387d37584. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076610652 — a six-check JSON result.
Magnificat (Formerly Attrib. Pergolesi): Deposuit Potentes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fd6fe21c76b1e84f205fbd4f0ec64dec4c3d11c9ed527313e15927547c787c. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076610653 — a six-check JSON result.
Magnificat (Formerly Attrib. Pergolesi): Suscepit Israel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366f16dce1deebb287494a083224e700ff7a677728a85efba176b36397b2606a. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076610654 — a six-check JSON result.
Magnificat (Formerly Attrib. Pergolesi): Sicut locutus est....Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69c23251e0b7c4d630ddf63600378ac25070d8f870a28922624a3d1a46f5a5a. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076610655 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b34e75ffcc182f49c61b590ea40ab9234cc560dfadf30da89e1fc86b31a529b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507100156 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7e0e54df4ef3a6aa2c9e2e7481f8553005c6b6da9dd47ef8d323307fe1c802. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077842801 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944c0765c4447bf355f2a28a079862914206e5faca4ce051ec989b6889084c71. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076610651 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043ca22736cb84df9e4ee42471496737606ed9fbc2066206e070156387d37584. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076610652 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fd6fe21c76b1e84f205fbd4f0ec64dec4c3d11c9ed527313e15927547c787c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076610653 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366f16dce1deebb287494a083224e700ff7a677728a85efba176b36397b2606a. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076610654 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69c23251e0b7c4d630ddf63600378ac25070d8f870a28922624a3d1a46f5a5a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076610655 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9b4779f22bc0f9b680a4431be96d4191efa2cee87286cd02e929c5314141b3. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076640003 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0470d54cac3b40794be8cfbd45d8913ac962d05c2580fc8ca52fa95c3067a6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCFU0600913 — a six-check JSON result.