Zdeněk Mácal (; 8 January 1936 – 25 October 2023) was a Czech conductor who worked internationally. The promising conductor who had won international competitions left his home country of Czechoslovak
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4ee532be5f8af603d23442767aae92b9f2628e2fda23455f522b4e31893735. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1bfa293-0593-41de-876a-b735016abd97.json and https://artists.proofprofile.net/proofs/artist/a1bfa293-0593-41de-876a-b735016abd97.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: Piano Concertos No.23 K.488 & No.24 K.491
40 Tracks for 40 Years: Delos' 40th Anniversary Celebration!
Dvořák: Cello Concerto In B Minor, Piano Trio In E Minor ‘Dumky’
Mussorgsky, M.: Pictures at an Exhibition (Orch. M. Ravel) / Dream of the Peasant Gritzko
Dvorak, A.: Te Deum / In Nature's Realm / Carnival / Othello / Psalm 149
Dvorak, A.: Requiem / Symphony No. 9, "From the New World"
Dvorak, A.: Stabat Mater / 10 Biblical Songs
Rachmaninov: Rhapsody on a Theme of Paganini - Prokofiev: Piano Sonata No. 7 - Stravinsky: Three Scenes from Petrushka
Fantastic Scherzo for Orchestra in G Minor, Op. 25
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2385a5ff23889479665f95e7e8fd8d2d9b84e5a02903a6035fd4985924c53c74. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA166700358.
Rachmaninoff: Piano Concertos Nos. 3 & 6 Preludes
Reiner: Cello Concerto - Sonata Brevis - Elegy and Capriccio - Verses
Gustav Mahler: Symphony No. 1 - Alma Maria Mahler: Songs
ブラームス：交響曲第 3番、大学祝典序曲
チャイコフスキー：マンフレッド交響曲
ブラームス：交響曲 第2番,悲劇的序曲
リムスキー＝コルサコフ: 「シェエラザード」、ムソルグスキー: 「展覧会の絵」 ラヘﾞル編曲
Suk: Suite "Pohadka", Dvorák : ceska Suite
Tchaikovsky: Symphony No.1 "Winter Reveries"
ドヴォルザーク：交響曲 第 9番 「新世界より」､ ノヴァーク：スロヴァキア組曲
交響曲 第 9番 ホ短調 新世界より, 作品 95: 3. Scherzo. Molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb82c2a00233102519bc83ae41c13ee69a9d680a5a003d5df2d9157bc4e037f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPG200607868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e2570ad8e77d5c193b3eb900f208cdc4b2ab4da1a1466c2f2c2545aad76fcc. 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/JPG200607872.
ドヴォルザーク：交響曲第 5番＆第 9番「新世界より」
交響曲 第 9番 ホ短調, 作品 95 新世界より: 1. Adagio - Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d31e48bea4a759d8f96d30a5120d2a2923263248085ec0d4eeca14f48ec576. 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/JPG200607864.
交響曲 第 9番 ホ短調 作品 95 新世界より 第2楽章
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0a4a3b9f13c84fb9094e5954eaf08b40e723542f5f72f6735988353066788b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/JPG200607866.
交響曲 第 9番 ホ短調, 作品 95 新世界より: 4. Allegro con fuoco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577a6d71a129a62c057a98636b49682d35c8c343ba46f367d2f3beef9b14b3c4. 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/JPG200607870.
Smetana: Wallenstein's Camp - Dvořák: Symphony No. 7 in D Minor
Czech Classics (Live, New Year's Eve 2020)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e806b426917382a007ca8cb6679113c0d48c5486d7bae435fe75d7a003fb05. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZL200000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e4d8a9ca1228ec0cabcd8a1ea72611fcd3b94b41d343fa90b6327bcfae8530. 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/CZL200000002.
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
Berlioz, H.: Symphonie Fantastique / Romeo Et Juliette (Love Scene)
Gliere, R.: Symphony No. 2 / The Red Poppy Suite
Dvorák Symphony No. 9/Symphonic Variations
Dvořák: Symphony No. 9 in E Minor, Op. 95, B. 178 "From the New World": II. Largo
The Classic Experience - 135 of the greatest classical tracks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb65d36fd6d93c208b300c8e8977d0dbcdd103ff1f6dec161bfcd154ce68d9ef. 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/GBAYD8200533.
Cello Concerto in B Minor, B. 191: II. Adagio ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ab86a7788a4ae54ecdbf4beb46ab307e88a2bedc9c0ab727869f6f613d4ac2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD9500528.