Grace Melzia Bumbry (January 4, 1937 – May 7, 2023) was an American opera singer, considered one of the leading mezzo-sopranos of her generation, who also ventured to soprano roles. A pioneer among Af
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 0x67c31832081892abebcb5529773e12944215c908c0b6d5c356dfbf251f277726. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57ce223b-e3cf-4390-b8bd-6b1e1232b304.json and https://artists.proofprofile.net/proofs/artist/57ce223b-e3cf-4390-b8bd-6b1e1232b304.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Wagner: Tannhäuser, WWV 70 (Live) [Orfeo d'Or]
Tannhäuser (Dresden Version), Act I: Overture and Venusberg Music "Bacchanale" (From Paris Version) - Live at the Bayreuth Festival, 1962
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 0xb105ac54ea41101121222bae0e2ec18378e432087c8e72ef4333d3dc0a44e1cf. 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/NLA506200605.
Tannhäuser (Dresden Version), Act II: Dich, teure Halle, grüss ich wieder "Elisabeth's Greeting" - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4351b27b73a55515227bcb4e8a010d0f20341a061c12f70a786b88e77dc0f5c8. 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/NLA506200615.
Tannhäuser (Dresden Version), Act III: Prelude (Tannhäusers Pilgerfahrt) - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59dd3f709b66e29c1b16ba71a31fb21025e5a39fd5695216e7fafd81b222bb4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506200630.
Tannhäuser (Dresden Version), Act I: Geliebter, sag, wo weilt dein Sinn? - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dc50997fa30adcb4106d6a1501ee914278a9a1534506a6c8fa18478eca88f7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506200606.
Tannhäuser (Dresden Version), Act I: Dir töne Lob! Die Wunder sei'n gepriesen - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bf5522e03de9879e2fe5f4a75b1021f50496fc16f44c647477df1b6704f892. 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/NLA506200607.
Tannhäuser (Dresden Version), Act III: Beglückt darf nun dich, o Heimat "Pilgrims' Chorus" - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9aaa84bd2c3ae71eb0cc0c27f0aeefc498db3c435e8e7688cc2fdad94175139. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLA506200632.
Tannhäuser (Dresden Version), Act I: Geliebter, Komm! Sieh dort die Grotte! - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c0ccef7dfc5155b3a46192a52b2cb519573d4c14d03fd28116b854984a04eb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLA506200608.
Tannhäuser (Dresden Version), Act III: Allmächt'ge Jungfrau, hör mein Flehen! – Elisabeth, dürft ich dich nicht geleiten? - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea77bff7f75274868ee037564748495f80893366c391816e8bda94c93446294. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/NLA506200633.
Tannhäuser (Dresden Version), Act I: Stets soll nur dir mein Lied ertönen! - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143454cbc8df95be8983ba4d82435386d010458245deb8b28d49548369dbd293. 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/NLA506200609.
Tannhäuser (Dresden Version), Act II: Freudig begrüssen wir die edle Halle - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41338ba469b836812f53415afc2270996295da3131fe31bb8f1431eb5d48cf4a. 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/NLA506200619.
Tannhäuser (Dresden Version), Act III: Wie Todesahnung Dämmrung deckt die Lande - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59b2b7c792d0c45d9846cb2abceb8adb00c40240ce80e8b8c9a6e032aad77a4. 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/NLA506200634.
Tannhäuser (Dresden Version), Act I: Zieh hin, Wahnsinniger, zieh hin! - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7733da697bbc2f7caca7cbe6cd4853ed34a32c8a505d757f060b8d352aa07323. 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/NLA506200610.
Tannhäuser (Dresden Version), Act II: Gar viel und schön ward hier in dieser Halle - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c9af2c179149190f27032c2b731edf0cb9aaabd844f049ab0acea3f998fd72. 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/NLA506200620.
Tannhäuser (Dresden Version), Act III: O du mein holder Abendstern "O Star of Eve" - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79edcc68f765cd30ec57f8a4adf9612cd0d53717505bdeb7f854ff4957b50573. 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/NLA506200635.
Tannhäuser (Dresden Version), Act I: Frau Holda kam aus dem Berg hervor - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04df10587c249997348e1a01442fb26de952e082e88c9292b10126626dcd6fa7. 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/NLA506200611.
Tannhäuser (Dresden Version), Act II: Blick ich umher in diesem edlen Kreise - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb644077caf97e6183274f7b9a5382ceb21b73453cc34fa0b78c7a89996d1bc9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506200621.
Tannhäuser (Dresden Version), Act I: Zu dir wall ich, mein Jesus Christ - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60f8433cd786dfe9f68c7301eb90d887c8df96a766883a6517bac1ecab4c779. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506200612.
Tannhäuser (Dresden Version), Act II: Auch ich darf mich so glücklich nennen - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4eb8fc2b9353d42e1d4ab8bc403d1255bc65dbca84a36e17fc377d6da751e3. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NLA506200622.
Tannhäuser (Dresden Version), Act I: Wer ist der dort in brünstigem Gebete? - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad6cb6957af0cc74e70e8ef1aecf43ceff429a7e83ef78b118deea80027e40b. 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/NLA506200613.
Tannhäuser (Dresden Version), Act I: Als du in kühnem Sange uns bestrittest - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb6471008da23effb1183b9b68d13378420e72a555f6c69b0d6dd45fcf8981a. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/NLA506200614.
Tannhäuser (Dresden Version), Act II: Dir, Göttin der Liebe, soll mein Lied ertönen! - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d6c3b0b04b9ba5e98b4e69b95402667356f41e7e58e26fbe45ff053e25e7b8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506200624.
Tannhäuser (Dresden Version), Act III: Da sank ich in Vernichtung dumpf darnieder – Halt ein! Unsel'ger - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3303af50ce039332882e2ad46744596add8af7cc69a5ada8d69686e06435052e. 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/NLA506200639.
Tannhäuser (Dresden Version), Act II: Der Unglücksel'ge, den gefangen - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b5c11f7cb8e08986eae17296ee6ac9ae5e20756a257f20141e92509c89bb97. 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/NLA506200626.
Tannhäuser (Dresden Version), Act III: Heil! Heil! Der Gnade Wunder Heil! - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f7d3096fcd6d5465ea06cb85fc50aef1ca64d3fc16ed05bb1df65d345fba0f. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506200641.
Tannhäuser (Dresden Version), Act II: Weh! Weh, mir Unglücksel'gem! - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6144cfcbce85748aa32533105b0c86d85c01f340e3423dc4977950105d60bf6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLA506200627.
Tannhäuser (Dresden Version), Act II: Versammelt sind aus meinen Landen - Live at the Bayreuth Festival, 1962
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3c4f496e5eb398e25c80cdae22b6a4aeb5c52b8a85a6d4823df96ea2338277. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLA506200629.
Messiah, HWV 56 / Pt. 1: 1. Accompagnato: Comfort ye, My people
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99f056e78aecfb25fbeaf64ed9aaa2f6d000a6ebf4da36212b33a244cc24f32. 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/GBF076141702.
Handel: Messiah (Adrian Boult – The Decca Legacy II, Vol. 2)
Messiah, HWV 56 / Pt. 1: 13. Pifa (Pastoral Symphony)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fbebd8f21f9fdeaa415fa24e0d733369050751024b02521a3ce6733ba9dc60. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBF076141712.
Messiah, HWV 56 / Pt. 2: 36. Air: How beautiful are the feet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159837b7a7b675fce9210f40d90f61cac1c8a01729bfb978b9953c2982d783e3. 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/GBF076141731.
Beethoven: Symphony No. 9 in D Minor, Op. 125 "Choral" (Live)
VERDI:MACBETH,(Excerpts), Pedro Lavirgen, Grace Bumbry, Dimitri Nabokov, Cornell MacNeil,Ottavio Ziino.