Victor Vladimirovich Ewald (27 November 1860 – 16 April 1935), was a Russian engineer, architect, and composer of music, mainly for conical brass instruments. Biography Victor Ewald was born in Sa
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 0xe8bf757fc03b031d05c06ba7b70314f5f71e5545bc337403aed236a7f576d24c. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c9be809-62bd-44dd-9560-8f918715cbda.json and https://artists.proofprofile.net/proofs/artist/8c9be809-62bd-44dd-9560-8f918715cbda.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x615fbd7a3fc416e2f62173a92ff095ffaf8b84fb4822361a4555525dfe9d23e7. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/SEAEG9313010.
Brass Quintet No. 1, Op. 5: II. Adagio - Allegro - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305dcae86e640c4e7f19985a9b599898eddf0ec2c7cbb165dc46d3c6bddbbe67. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEG9313020.
Brass Quintet No. 2, Op. 6: I. Allegro risoluto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc67d30812affecf42460ee3bfc0a39db18cef807a2ff5e5a0e938345e8fd5bd. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/SEAEG9313040.
Brass Quintet No. 2, Op. 6: II. Tema con variazioni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3293023fd32ad75b4490d4b7e56c11cefc428ec1d03ee277e35a84ee6b962881. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/SEAEG9313050.
Brass Quintet No. 2, Op. 6: III. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ed261ab8378b7e8b94f5e42c6f1b48906a16e4b7e89598a1e2f4e7116c37ed. 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/SEAEG9313060.
Brass Quintet No. 3, Op. 7: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73d579dcfb302f8a0526d2a940cddb34152fa5571cef5608884776f691e7f1b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEG9313070.
Brass Quintet No. 3, Op. 7: II. Intermezzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce69fd450463dafb674b70ced9cab10beeaff9894cb7cb10d2370ef862880135. 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/SEAEG9313080.
Brass Quintet No. 3, Op. 7: III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6334beaeb0b46e87f1ff1daae415a15dab7de6c16a34b04599474bcfc802378f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SEAEG9313090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df253791fe4569dfa4b30d1d65783be6b748aa8993471e592bdf5e2422c0b39. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEG9313100.
Brass Quintet No. 4, Op. 8: I. Allegro commodo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f3e5b8e745d1b2e71af6610762843df1034d321bb10fcf6f46aba55aeb0559. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SEAEG9313110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff55503752120aa2b2dd543ae1261a56e21e52f279c279989decebd3e467c7e. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/SEAEG9313120.
Brass Quintet No. 4, Op. 8: III. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d11bf429c867fdc7f12fd7de375453b68177a6d08598f5d6069b5f9aa82a8ee. 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/SEAEG9313130.
Brass Quintet No. 4, Op. 8: IV. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94fbbdc7f7bc409e89b976581b38cfb9e51ad668f7e5c4677906a61b6213155. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SEAEG9313140.
Ewald: Musique de Chambre à Saint-Pétersbourg
Victor Ewald: Quintet No 3 for Brass Quintet
Quintet No. 1 in B-Flat Minor: II. Adagio - Allegro vivace - Adagio
Arnold, Ewald, Bozza, Maurer, Dahl & Clavert: Works for Brass Ensemble
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e5833f0dee7d3ea63156d0c1dc677d19169f198a174210d940e06589a34223. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0209505.
Quintet No. 1 in B-Flat Minor: III. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9374a2d21547bc2cff9d54665a6abb09099dc8a4b2c5e9f4869875b29b008c80. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0209506.
Quintet No. 1 in B-Flat Minor: I. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edb35a5b7d0b7386d962c3e515c0a3683dd86d5ffe9147d0b265d780136f093. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0209504.
Quintet No. 3 in D-Flat Major, Op. 11: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b19196117a504ea518a6af9015afa215c63249253f8a17b9f80187e2b25f691. 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/GBLWD0400605.
Quintet No. 3 in D-Flat Major, Op. 11: II. Intermezzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600ec5443204682f88c012e8e5158029164f474b955c5b6a6130801b548de48f. 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/GBLWD0400606.
Quintet No. 3 in D-Flat Major, Op. 11: III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90807bcb510446c3347d331c946b4423d0d1bb69f70243d41b203870d48b13d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0400607.
Quintet No. 3 in D-Flat Major, Op. 11: IV. Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9363a915ed119b0180ea5baf01be3ce37985408b83bcb19282bd65e9274c3d7d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0400608.
Brass Quintet No. 1, Op. 5: III. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d3c0d788105fa2331bbb1aa703157be133b315af6e62c8ed6268e5da4a32cc. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/SEAEG9313030.