Hofkapelle Stuttgart, historically the Württemberg Hofkapelle is a German orchestra based in Stuttgart which has existed since the 16th century. It was the band of the House of Württemberg. Since 2002
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 0xa614ba7f62cecaef73cdcd3047d1264ec7873828144d2840e906a6d644c7ceb5. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37e37168-97f2-4a11-a948-e08fcc131d0c.json and https://artists.proofprofile.net/proofs/artist/37e37168-97f2-4a11-a948-e08fcc131d0c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Stabat Mater, Hob.XXa:1: I. Stabat Mater Dolorosa
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 0xb78a87b2f517e614aba1404d0803435f7b8878fde6415e65ff6eb1db4662686e. 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/DEB111716001 — a six-check JSON result.
Stabat Mater, Hob.XXa:1: II. O quam tristis et afflicta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3153f40e13919ef67ade9da431d67d2322850feec71fafaf77958808907f49. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111716002 — a six-check JSON result.
Stabat Mater, Hob.XXa:1: III. Quis est homo, qui non fleret
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd81a0354365ed23da4ca21966302ba4a1bed6a2ec16f6a874b7ef84b938ba6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111716003 — a six-check JSON result.
Stabat Mater, Hob.XXa:1: IV. Quis non posset contristari
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11287f64f289c77ed5a4b4126fcaf94c1766976e8a1a4a48a62709179663daf8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111716004 — a six-check JSON result.
Stabat Mater, Hob.XXa:1: VI. Vidit suum dulcem natum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946bfe2ba7a5a5557c41aa24d5c38a2f25174edd4321c75523c08d5d9ba6160a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111716006 — a six-check JSON result.
Stabat Mater, Hob.XXa:1: VII. Eja mater, fons amoris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8f20820c28f48443d977856bb7ba5d6b1d97cb940358ced298fb4fb1f51b1c. 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/DEB111716007 — a six-check JSON result.
Stabat Mater, Hob.XXa:1: VIII. Sancta mater istud agas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3ddd069510d90e3df1ea0effb7e0d096e8b1b61d5b03a99468b67aca8d675f. 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/DEB111716008 — a six-check JSON result.
Stabat Mater, Hob.XXa:1: X. Virgo virginium praeclara
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3509c5ee99b837d9d22be1e8dff88f8a3b2bd9feb110aed77ddfe09c3113580. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111716010 — a six-check JSON result.
Stabat Mater, Hob.XXa:1: XI. Flammis orci ne succendar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170687070245fd8e7b7e81317f1718c286a0e7de164902c6f77584b2ef948314. 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/DEB111716011 — a six-check JSON result.
Stabat Mater, Hob.XXa:1: XIIIb. Paradisi gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012134d8488881bf68ab490f4677d9084496d51e7e61fedfef1d8aebf4631baa. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111716014 — a six-check JSON result.
Wolfgang Amadeus Mozart: Missa in C Minor, K. 427
Mass in C Minor, K. 427 "Grosse Messe": I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe265e403f16af55d57f67685bb7a9b5001be33e9e5e67a31e5ae9e69537cef. 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/DEB111609601 — a six-check JSON result.
Mass in C Minor, K. 427 "Grosse Messe": IIa. Gloria: Gloria in excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f075d415eb64e96d23e8e2b30cfd26cf4dbc91c5ae50740aa31a64e99db8db. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111609602 — a six-check JSON result.
Mass in C Minor, K. 427 "Grosse Messe": IIb. Gloria: Laudamus te
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040a64d4f22070ef13a1a9d0fcc0f6cbaa8e97876088f1beac70b70c2345fade. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111609603 — a six-check JSON result.
Mass in C Minor, K. 427 "Grosse Messe": IIc. Gloria: Gratias
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1059260e6849e14ffef051da5c047df70927b9a1e7edc1433f73f0358beb30. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111609604 — a six-check JSON result.
Mass in C Minor, K. 427 "Grosse Messe": IId. Gloria: Domine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1bed3a2624f6afd1be6400dcbd978cdfa33a55f3b24aa2717141d04b0ab111. 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/DEB111609605 — a six-check JSON result.
Mass in C Minor, K. 427 "Grosse Messe": IIe. Gloria: Qui tollis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5d5b961dba7bd4a4fbd789ca28d049f52f3d3e7a32fdae1b97b486980f16e2. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111609606 — a six-check JSON result.
Mass in C Minor, K. 427 "Grosse Messe": IIg. Gloria: Jesu Christe - Cum Sancto Spiritu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe64dbe9e014b787d0b8e98570b8350da62ee04a090947baef8ace7740d3c06. 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/DEB111609608 — a six-check JSON result.
Mass in C Minor, K. 427 "Grosse Messe": IIIa. Credo: Credo in unum Deum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04ead3e797c3bcca15c266cb1af0d7affce4e09e160b672677e7c6c0f063911. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111609609 — a six-check JSON result.
Mass in C Minor, K. 427 "Grosse Messe": IIIb. Credo: Et incarnatus est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0dc10c1944b7aa65d2a189623e84de616599d5debf0bd89fcb032679515a83. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111609610 — a six-check JSON result.
Schubert: Mass No. 5 in A-Flat Major, D. 678
Haydn: Die sieben letzten Worte unseres Erlösers am Kreuze (Vokalfassung)
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX:2: I. Introduzione. Maestoso ed adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df4bb503e8640591b997ed6c12b39731e921e4000a74e4e5c3bc94899a45dba. 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/DEB112200101 — a six-check JSON result.
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX:2: II. Vater, vergib ihnen. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eba16f98a7a1ec372ca596d0184428d6626a231a81e85a0b953d832c9f593b6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB112200102 — a six-check JSON result.
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX:2: III. Heute wirst du bei mir im Paradiese sein. Grave e cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f8cc59366e3e8495a57a65ee53eaccd54a8528ab3d37cb912ed66da4bf4705. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB112200103 — a six-check JSON result.
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX:2: IV. Frau, hier siehe deinen Sohn. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d8e98283551aa793ecf3503a5ab9500e55ff8a1689ce6caf0638663b95951c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB112200104 — a six-check JSON result.
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX:2: V. Mein Gott, warum hast du mich verlassen? Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53f9b0911eea5204a21c537b2b41340a788821cc469d5b0ced01f07c0a764d8. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB112200105 — a six-check JSON result.
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX:2: VI. Introduzione. Largo e cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051b73d17615ad461e20bb8b0fcc246481e2325173969bda8f7c8d76675a7bc2. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEB112200106 — a six-check JSON result.
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX:2: VII. Mich dürstet. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc40654196913776510a739b90fce3668ed9ae6fb0916e2427e5d45b75d4384f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB112200107 — a six-check JSON result.
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX:2: VIII. Es ist vollbracht. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00bdf56c3b5e87437f42bf0046d6836c787bdb6b452bd18b71abd0f5b8647e4. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB112200108 — a six-check JSON result.
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX:2: IX. In deine Händ', o Herr, empfehl ich meinen Geist. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c8fb203fb9accf23ba0aa9dab5c188182c133fd5fb790310af7298fed8e453. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB112200109 — a six-check JSON result.
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX:2: X. Il Terremoto. Presto e con tutta la forza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d4f3428c0ec270340cd1868ee1e5e9e1ba9520b66f3ad36e7c4a6e0863958d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB112200110 — a six-check JSON result.
Beethoven: Mass in C Major, Op. 86; Cherubini: Sciant gentes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506d9e55d76d4fe263a1552dc398fcf83f7e066723eefc5e0f1ce09b1ef58d6d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEB111300107 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53be26b81582bcffe9c44b47a3cab71af5b73f583ded0cd24ef8a7d8a8a60e4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111300108 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f50d7c5be7f316e80e555c967bfe2c98573b5651eaafa6e375fe3e721149df3. 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/DEB111300109 — a six-check JSON result.