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 0x871b98f208b9e999c27245884be4ce0d531535c7f21807e116a633c7b6dfe3a7. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8ba947b-794b-4740-8226-02f859487650.json and https://artists.proofprofile.net/proofs/artist/f8ba947b-794b-4740-8226-02f859487650.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
50 Years of Hungaraton (1951-2000): Singers
Great Hungarian Voices: Mária Gyurkovics
Sved, Alexander: Verdi Baritone Arias and Scenes
Opera 125 (Stars of the Hungarian Opera, Vol. 2/4, 1884-2009) (1931-1966)
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 0x33865b454cc6fac2505d2d1fd1ffa5a22feda2bc469636c7c5a63179add9f4f2. 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/HUA250401101.
Janos vitez (Hero John): Act II: Bartolo, mi lesz azzal a csataval?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142a7902dd65e1f466bdacb3b61cdd9f21c97a4af98cf7dc45012d57b6edc42d. 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/HUA250401201.
Janos vitez (Hero John): Act II: Janos belepoje: Szep huszarok
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5093092760f11a662f1f73dc1d208ee6e762e78c19d98fb6daaf6d148c3903f. 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/HUA250401203.
Janos vitez (Hero John): Act I: Mellettem csatazo pajtasom
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609b43f1deeda6cb2bf7277388349bef8035b47aee76eb12524144b3554df8c5. 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/HUA250401104.
Janos vitez (Hero John): Act I: Iluska dala: Van egy szegeny kis arvalany
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813208914737b1976860f56cfdfa62e792f1fc9ba39ddf61631aa83ee38bc8be. 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/HUA250401107.
Janos vitez (Hero John): Act II: Finale B
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73d43f3989d856d06821cf30699cc93ef74760cf15862593a9903825dd80ed8. 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/HUA250401207.
Janos vitez (Hero John): Act II: Finale C
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590a118bce4f8959bda4e7ebd75e5000cdb2903542979a4dd29601ee8c545ab3. 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/HUA250401208.
Janos vitez (Hero John): Act III: Elozene
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b50e6869fa356e49dfd13428064cffe54e5e95abef80613e1cbf34d224403ae. 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/HUA250401209.
Janos vitez (Hero John): Act II: A francia kiralyleany dala: O csak ne volnek gyonge lanyka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cfbb110133259fc47ac10a5c5cce2f7c39ac696a0fb3a924b35a6c92e683bf. 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/HUA250401111.
Janos vitez (Hero John): Act III: Finale A: Balett
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d752bb65755c56c9daf1cbf334fc59f280b575b9f2c265a12480a8359a0f595. 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/HUA250401212.
Janos vitez (Hero John): Act I: Megjottek a szep huszarok
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf45c4beabc22102dd2873967e9ad6ec53d55d6c923586e4bac13dbef853845c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/HUA250401102.
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
Janos vitez (Hero John): Act II: A francia kiraly belepoje: Vivtam eletemben sok nehez csatat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cfcf9e6eb9030280effa9eb169b58fd47a653164bdcc22a5d5c60441f238a3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/HUA250401202.
Janos vitez (Hero John): Act I: Bago dala: A fuszulyka szara
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590e3a5719c9beca8f5843dbb4fed5778ffb7594736c02cd6f8a352aa7ac26d1. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/HUA250401103.
Janos vitez (Hero John): Act II: Egyuttes: Szep a huszar, ha lora pattan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a4a3619f46e4d6d46ca4cb9a88b99a514c545129d24f3ad0ef784447864bfb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA250401204.
Janos vitez (Hero John): Act I: Egyuttes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7491645c88cadef014330bfc8bc58023c2f624099d4e2571f9685b173a3cfc85. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA250401105.
Janos vitez (Hero John): Act I: Jancsi belepoje: En a pasztorok kiralya
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd41a11e8259bef41ba770b9d1d534894547f9742ae5f3213bc667b1c213986e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA250401106.
Janos vitez (Hero John): Act I: Furulyanota: En vagyok a bojtargyerek, Jancsi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e51ced84a31fc3a910b73a84e0b7a161edbed60b3a454a6697c3e8123255f5b. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/HUA250401108.
Janos vitez (Hero John): Act III: Bago dala: A furulyam, jaj be busan szol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e937e85f3b78cef3bd04aea7b56a593d981d0e3813a0871348e99ffabdae986. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/HUA250401210.
Janos vitez (Hero John): Act III: Kek to, tiszta to
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc108b632975e7863c0a966c5acd28584b47f4462c1456aa6ebbc9671bf934de1. 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/HUA250401211.
Janos vitez (Hero John): Act III: Finale C: Befejezo melodrama
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc616f86ac70d449f67e21a7b3a612d9c33193a422ce7c0649d43ad0f758ad7a8. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/HUA250401214.
Mozart: Die Entführung Aus Dem Serail & Symphony No. 39
Mozart: Don Giovanni (Klemperer Rarities, Budapest Vol. 8) [Sung in Hungarian]