Barbara Hendricks (born November 20, 1948) is an American lyric soprano and humanitarian. Born in Arkansas, Hendricks studied chemistry and mathematics at the University of Nebraska before becoming a
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c8566e56a05651f752589d891302fd64e2202c901b205d365e091f493ce442. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84ebdfa1-5756-4581-b373-74a77afd661a.json and https://artists.proofprofile.net/proofs/artist/84ebdfa1-5756-4581-b373-74a77afd661a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: Die Zauberflöte, K. 620 (Highlights)
Barber: Adagio for Strings, Op. 11a (After "Molto adagio" from String Quartet, Op. 11)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1701d2207fb4431238b329a183a7a2c6b0632cc28ae0ec08c3437cd758dc99ee. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBAYC9401155.
4 Songs Op. 13: No. 3 Sure on this shining night
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46428613291256fca002eebdae9de093525bdf119f6319a99a58822177aa078. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9401158.
Bach, JS: Jauchzet Gott in allen Landen, BWV 51: No. 1, Aria. "Jauchzet Gott in allen Landen"
Carl Philipp Emanuel Bach Chamber Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3796c655149b3cac8c322603aa4cad4d33ea884630b153d726e47a8006b96d. 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/FRZ118901390.
Bach, JS: Jauchzet Gott in allen Landen, BWV 51: No. 3, Aria. "Höchster, mache deine Güte"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba7e14398e9d1aecbdb22c6e257bbaf2bb09c8db775b0e0ed865fe1490d9a6d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ118901410.
Bach, JS: Jauchzet Gott in allen Landen, BWV 51: No. 4, Choral. "Sei Lob und Preis mit Ehren"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0d23c4144f1f89d72f01e67ef391ae7a55b81340c3106fae6bd03d88733532. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/FRZ118901420.
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
Bach, JS: Ich habe genug, BWV 82: No. 1, Aria. "Ich habe genug"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe278dbb1743d58ad73a55bf860f37ad121fe36ac9b9a2b6ff5a5c2b2c9082af5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRZ118901440.
Puccini: La bohème, Act 1: "Sì. Mi chiamano Mimì" (Mimì, Rodolfo, Schaunard, Colline, Marcello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf277fc565da5cd63cb323b4b6c0f6e27217703dd12a41592eb8324f5aba81f89. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRZ208701404.
Puccini: La bohème, Act 1: "O soave fanciulla" (Rodolfo, Mimì)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72529187322b0b27f1ca1d6d182d9c0407c9f53777cd05a8825fe9fdc1803a3. 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/FRZ208701405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76499d1cf040c6f06697c356c621e78a89db26ef7df62246d8e783c2f1ad9fd3. 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/FRZ119000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e9d62c3f7478d900b8377b441106d6019a478c69e80f7ed47e03ea19758f04. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9603891.
La bohème, Act I: Sì, Mi chiamano Mimì (Mimì, Rodolfo, Schaunard, Colline, Marcello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf277fc565da5cd63cb323b4b6c0f6e27217703dd12a41592eb8324f5aba81f89. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRZ208701404.
Mozart: Le nozze di Figaro, K.492 - Original version, Vienna 1786 - Act 4: "Contessa, perdono ... Ah tutti contenti"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897c57868fc0a8bcbb7fbec790d987b045ada12c31accabcfe4706834f472c14. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLA508400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2f2febc4350bdc8bbe6b68a9175506bacf6501e60f305a2f0e5e5028e9b0ff. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRZ119504770.
Vivaldi: Gloria in D Major, RV 589: III. Laudamus te
Academy of St Martin in the Fields - Vivaldi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f705a3a4e160ee2120cb813781146e53e212dff78625f80eb97d3d811936f1. 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/GBAYC9001138.
Le Nozze di Figaro: E Susanna non vien! ...Dove sono i bei momenti (Contessa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4a6eb2f600b1840ed41114b9c79e4c459ae6cd9c14de85f184d35c66a7ffe2. 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/FRZ118400035.
La Wally, Act I: Ebben?...Ne andrò lontana
Orchestre Philharmonique de Radio France
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3994299d98af799a5228676e51def4c693a4645cd59f22765ff50342f89f4a8b. 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/GBAYC0301920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8c012430d972477937010d5ab1c7214f8c86e69ca193a7c5da149e077b6f5f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBAYC9603890.
Vivaldi: Gloria in D Major, RV 589: VI. Domine Deus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc3f376264084a39c84e89ade47bf946c0bf170b994dcb8635dbdb7cc8586c8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBAYC9001141.
The Pirates of Penzance 'The Slave of Duty', Act I: Poor wandering one (Mabel, Girls)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d66d80e6fcc6dfe3859a46d04dbcbea69879f3da5aa8d3aa03d0e839a6ebcb7. 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/FRZ119209970.