Julius Fučík is the name of: People Julius Fučík (journalist) (1903–1943), Czech communist journalist and leader in the forefront of the anti-Nazi resistance, the composer's nephew Julius Fučík (
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 0x940e1561cfe5e614427ea8ad0f7d559af4c46cd18858e19ab2e5ad29009fa839. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06927f53-a94d-4735-9436-3efe574276c6.json and https://artists.proofprofile.net/proofs/artist/06927f53-a94d-4735-9436-3efe574276c6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Julius Fučík - Unknown (World Premiere Recording)
Die lustigen Dorfschmiede, Op. 218: Die lustigen Dorfschmiede, Op. 218
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 0x63e3b92646697e77fcff08c8825428760fb569f78eaf36808c1f822d462fd2a3. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1503008.
Einzug der Gladiatoren, Op. 68 "Triumph March"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e81dce0e275c38ee2178e36e4e614f519a221d2231a3e9641ad1c6ccf1fa42c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB958614701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c559e4234b650706279acb0e7a36ba2abde9eccad7b55de4adce3acb844002f. 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/DEB958614706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71265ec52c03daaae8cf7d313d629f6fbe05cbb90ecd0791e31ca1d9aab7bed5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB958614707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d9f03d3b19ab4c8299cd832040f3676070a646540479a06e6e4e95b2bc0911. 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/DEB958614708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c61a175a76ed4abc4078340c004bece6b46b186309c52109d33707059e4b901. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB958614702.
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 0xe580b62348a97646f1c75400450676b8da3353e93e6b25dd75e88868608c36ec. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/DEB958614703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfb7ea146708e3fcbf98d3cd1a2f9c49943af7c861d212c83d4a41cb26ccf64. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DEB958614704.
Attila, Op. 211 “Marche hongroise triomphale”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e84a8f820ffce6eedf89e617596ba5eca3b5342adfcc6dbe402f5ed2357a280. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB958614705.
Julius Fučík: Entry of the Gladiators, Op. 68 (Arr. for Piano)
Marching Along - a Tribute to Classical Composers (Euphonium Multi-Track)
Der alte Brummbär, Polka comique, op. 210
Lebensmärchen, Op. 253 (Version for Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45d3b0173987e40179dabcdfbc23cb4eca6e82b5ab9ed51baa90eb38d7b9716. 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/HKI192317402.
In der Sternennacht, Op. 242 (Version for Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d9be361a139de23c84576da9d8f919745af49cab78e29b2056cba39907dbcc. 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/HKI192317404.
Die Herzenskönigin, Op. 70 (Version for Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d392f948ed982b2efd9f9558b1fe625469ae6f3b8a2940bf42fcc59d0200ab. 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/HKI192317405.
Im Traumland, Op. 270 (Version for Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f15d274b15aaffc0d3ac0add8e7ae758239cb56e97028765e8c8e578228809. 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/HKI192317413.
Aus der Liederstadt, Op. 126 (Version for Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdef7c094420c8c55b7876fe475e27fd2589d12c62594ec79b3331049b2bb53. 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/HKI192317414.
Im Adlerfluge, Op. 237 (Version for Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1f9854f805d441e136b8af815e8a93606911db759bbc6258c1e4590571a040. 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/HKI192317415.
Elbtal Gruß, Op. 246 (Version for Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5201b885d069a7a9bcfe3e1d10a0026146fb541fc892ee8a6c08400871245bb3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192317401.
Laban-Marsch, Op. 44 (Version for Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9516b5124a49dbf50243a0a915238f59e21fe77a65494b015092fd30f44de37. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HKI192317403.
Im süßen Traum, Op. 31 (Version for Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fe3471673ca02afeb537b126d267772e985b6376b4b485ede952893f6dc514. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/HKI192317409.
Entry of the Gladiators (Arr. for Brass Ensemble)
The World of the Philip Jones Brass Ensemble
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c82d0a2930933eb774caa873eb5eda862c2dc9c00209d32862c6b1c718af005. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF078541309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b6f1eb47399bc01b16825a292bac1aea0e96632ddef8c1218593c01446ec6d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA807201400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c72f653832454e722d599405ea7b655c2d6e712cdeab4b94e3ea9b3e60b57d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059603810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c82d0a2930933eb774caa873eb5eda862c2dc9c00209d32862c6b1c718af005. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078541309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c72f653832454e722d599405ea7b655c2d6e712cdeab4b94e3ea9b3e60b57d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059603810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f0f008704d592f130feae5a35352056d6fc62867c798e268b2d675f616aa07. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLL6R1700125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cbb6bcc491064393dbda88383a21bde981564c2e2a51e0dc044c9d47152678. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA5R1399708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1e0454427eaacb7c96fcf6dff2b8fa04e7811ecab886457a3893fd739cb515. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB959410725.