thumb|Luise Adolpha Le Beau (1872). thumb|Luise Adolpha Le Beau. Luise Adolpha Le Beau (25 April 1850 in Rastatt, Grand Duchy of Baden – 17 July 1927 in Baden-Baden) was a German composer of class
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 0xedaa2e4bc1fcdca998ce81dc42b668c4cdcaedcc6a730f829de6b6ccdc7b7967. 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/be8d35bb-726e-4e06-87e9-247dcfe1ea99.json and https://artists.proofprofile.net/proofs/artist/be8d35bb-726e-4e06-87e9-247dcfe1ea99.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x43fb8459847b5065d4e74fcd3520c4f397fad38e161e29649a66ac30794e0308. 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/DET901017701 — a six-check JSON result.
Le Beau: Chamber Works for Cello, Viola & Piano?
4 Pieces for Cello & Piano, Op. 24: No. 1. Romanze in E Major: Massig bewegt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f3e52dfed794d15cb310bef599164fe4f30b7a9494be80a9af6cb8c3ea68a2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES808702417 — a six-check JSON result.
4 Pieces for Cello & Piano, Op. 24: No. 2. Gavotte in A Minor: Nicht zu schnell
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e2fe1f7e7887f5cf12f5eaef820ace128e6093bd3b90974c65388670f7d5b5. 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/DES808702418 — a six-check JSON result.
4 Pieces for Cello & Piano, Op. 24: No. 3. Wiegenlied in G Major: Ruhig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489142a795fc613fc4237395261b706c3454f419317f2bf35ef0bfd45bc414b1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES808702419 — a six-check JSON result.
4 Pieces for Cello & Piano, Op. 24: No. 4. Mazurka in A Minor: Lebhaft
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b04ec475e7107b73b6480fbfd4df39b62ee8b4a73bc3f3243ce839f1fd75af1. 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/DES808702420 — a six-check JSON result.
3 Pieces for Viola & Piano, Op. 26: No. 1. Nachtstuck
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13412332583f2c7e191e0155a13eb4a98e4f720e947195ccfe56e0198507ea1a. 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/DES808702421 — a six-check JSON result.
3 Pieces for Viola & Piano, Op. 26: No. 3. Polonaise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98666a357867e0d037ae1f12b8d5f9818271bf024676aada0b41c0a156d05e2b. 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/DES808702423 — a six-check JSON result.
Cello Sonata in D Major, Op. 17: I. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e0d4b1f8d8e8381fabc534d6927fc74be676bb86d244adff2385075cb7bde9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES808702424 — a six-check JSON result.
Cello Sonata in D Major, Op. 17: II. Andante tranquillo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0852adb0f94623598d7a9b304e2f0cd849da504d9831c9d456735e8d544f62fd. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DES808702425 — a six-check JSON result.
Cello Sonata in D Major, Op. 17: III. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764dd90f330c813f6f29c0a191db140647d219527da4fd0736b38a2f6221c325. 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/DES808702426 — a six-check JSON result.
Le Beau: Quartet in F Minor, Op. 28: II. Adagio
Le Beau: Quartet in F Minor, Op. 28: III. Tempo di Mazurka
Le Beau: Cello Sonata in D Major, Op. 17: II. Andante Tranquillo (Arr. Assad for Guitar)
A Golden Cello Decade, 1878-1888: Dvořák, R. Strauss, Bruch, Le Beau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa85657e65d25a71c251ca15cf048ede48e2cd8b1a6d616a4a6bc531b7e791a9. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBAJY2239409 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12072c18fff1ca681b1f91e4d6078022d81c0568e3c2127a7258e7eab1a04791. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAJY2239410 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3902fe634e88d07395216e36ecb3bbd0d50b988a9f08fa58c47675d3cba5dd. 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/GBAJY2239411 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccabb6bdfa33f8b7fb0ce07de8874a4dd976e8f4221c735b00427b0daef14ee. 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/DEE862201865 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12072c18fff1ca681b1f91e4d6078022d81c0568e3c2127a7258e7eab1a04791. 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/GBAJY2239410 — a six-check JSON result.