thumb|Jean-Claude Casadesus while conducting Jean-Claude Probst (born 7 December 1935), known professionally as Jean-Claude Casadesus, is a French conductor. Biography Casadesus was born in Paris on
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 0x1fb932046dc75515c69a84f76436cc204859d53a090797f0d8fa42bb2e99a1c5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e620a21-2241-4aeb-a037-dd86c6737272.json and https://artists.proofprofile.net/proofs/artist/7e620a21-2241-4aeb-a037-dd86c6737272.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Gustav Mahler, Sieben Lieder Aus Letzter Zeit (Rückert-Lieder)
5 Lieder, Op. 49: No. 4. Wiegenlied (Lullaby) (arr. for orchestra)
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 0xd500c74d96449a0b9ea7bb129e62ed7e3919d0e9737ede5208c9c34fd66f7151. 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/HKI199827008 — a six-check JSON result.
Ein Sommernachtstraum, Op. 61, MWV M13: A Midsummer Night's Dream, Op. 61, Act III: Nocturne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b27a8fed056f1bab9d43e364f0bff25ce6173757575efbd1ba7f4174d15707. 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/HKI199815704 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4673112648b64b94b857a6c7d3817d3803dc03c203f96c75d965500c9db1eced. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/HKI190531210 — a six-check JSON result.
The Firebird Suite: V. Berceuse (Lullaby)
Belgian Radio and Television Philharmonic Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492aa4bac05b66f45b03bae3d9826f90eb5f29e379f04dbb443c418d6f83d01a. 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/HKI199313806 — a six-check JSON result.
Kinderszenen (Scenes of childhood), Op. 15: No. 7. Traumerei (Dreaming)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02de4edd72ff062503b3da0250fd6d563dd2a55e2d3542a68c53168ddd4f9046. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/HKI199304907 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b29088aedb78f622a740f9dac1586b0c7f7fe5083fecf0b5f3bff7fe570dce0. 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/HKI199240812 — a six-check JSON result.
Nocturne No. 8 in D-Flat Major, Op. 27, No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002f4a4972d21e5ea80bdf9264c2b057b70ad26d30111b24119327c84c95ea3f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/HKI199631507 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d3cdf9ec8d24631a9584adf0432753fb6574693d5eaac150aa0b89910fcc64. 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/HKI190605510 — a six-check JSON result.
Lyric Pieces, Book 5, Op. 54: No. 4. Nocturne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb212413d985bd34f4aec1fb44305a21cc1bc01416449ebccf2fbeee5d5b22251. 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/HKI199506204 — a six-check JSON result.
2 Pieces, Op. posth., B. 188: No. 1. Lullaby in G Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c300cc4dac22f67d88af4be1ebd0ceb522956da9ceb6ad9e00c0a4fb0165369. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKI190401410 — a six-check JSON result.
Suite bergamasque: III. Clair de lune (arr. A. Reed for orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec17272ea3c86442534c772841204ace2ce1930a09f69b52ca39ae8136db28a. 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/HKI199240809 — a six-check JSON result.
Album for the Young, Op. 39: No. 21. Sweet Dreams (Douce reverie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f173a0bb19c77b74a52db513a8af0414c185d619c4bf66c301438c204b04222. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199285034 — a six-check JSON result.
Chants d'Auvergne, Vol. 1: Series 3: No. 4. Brezairola (Cradle Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662306064e8008f5fcb2545602dc8573bf85bdbbd6a39a3d50020f996c95ca94. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190436413 — a six-check JSON result.
Lieder ohne Worte (Songs without Words), Book 6, Op. 67: No. 36 in E Major, Op. 67, No. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eeef5ecb23f467846313aa3228cf215362578f6e2d7f366732c9eddd6c65a34. 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/HKI199632320 — a six-check JSON result.
Wiegenlied, Op. 98, No. 2, D. 498 (arr. for orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7326ef74d582a793ad69b79efad20423c3f803b564f9e50be7d4380f688cad4. 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/HKI199827010 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1d72c496ad58b900b0c39c34fc998cdf7f5c258c9c6cc5cdbb737be39a8943. 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/HKI199230405 — a six-check JSON result.
Book of Songs, Book 1: Come, heavy sleep
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b91a634303046b80f3687a15fbc2b2adc8834ed7ad303a51f6ddcbba86065b0. 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/HKI199636926 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc37461aad594059a5b26a54bc7e8d2ac5c16d11517f9f86452e5c6467acc153. 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/HKI199241707 — a six-check JSON result.