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 0xb9837862d0042f111267f42dc707b3512a33815dfe8dc4614f19eea5bc91c057. 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/9ef24eb9-d7ca-46e1-96f4-b3223b55302f.json and https://artists.proofprofile.net/proofs/artist/9ef24eb9-d7ca-46e1-96f4-b3223b55302f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Balassa Éneki (Balassi Bálint énekelt versei)
Ókori Zene, Ókori Hangszereken (Az antik világ zenéje)
Szent László, A Lovagkirály (Szent László halálának 900. évfordulójára)
Mária, Magyarok Anyja [Énekek És Versek Máriáról (Xiii.-Xviii. Sz.), Volly István Emlékére]
Egy könyv lanthoz való... "Verje lantos lantát!" (A Xvi-Xvii. Század Magyar Lantzenéje)
Evangyéliomi Szent Lant - "Az Igaz Hitért Mongy Éneket" (Bozóky Mihály Dömös és Pilismarót Hites Nótáriusa, Kántor Tanítója Kéziratos Énekeskönyvének Legszebbjei)
Koboz Is Peng I. (Kobzosok és énekmondók a Kárpát-medencében)
Koboz Is Peng II. (Kobzosok és énekmondók a Kárpát-medencében)
Az 1848-49-Es Forradalom És Szabadságharc Dalai (Noszlopy Gáspár nemzetőr őrnagy emlékére)
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 0x9fb73a52ef36591e1822b826cd65ae29bc5e03a7d4d990c522c44931c00766d3. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/HUB282100403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9618be41de4f8fea9c3edba6e2acc2be1470ae4e3e0b0b0bbfca352cc5b2277e. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/HUB282100416.
Magyar István Király, Országunk Istápja (Történelmi Zene És Szent István XI-XVIII.sz.)
Az Úr Nevét Síppal És Dobbal, Dicsérjétek Lanttal, Kobozzal... (A magyar protestantizmus énekeiből 1550-1750)
Petőfi Él! (Magyar dalok és táncok a romantika korszakából)
Hallod-E, Pendítsd Az Lantot! (Válogatás a 2011-es európai koncertturné dalaiból)
March of the Bey's soldiers when besieging Belgrade
Ancient Turkish Music In Europe (16Th - 18Th Centuries)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab15336f7c3e3d376bed7ce62bf52b0f82459531cf94b50db8b4720569e06af. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA251256001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddeb9663672e5390763b48a28f65e5eca1d341aa6a15d1212d7a21ee0be879e8. 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/HUA251256002.
3 Turkish dances from the Linus Manuscript
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50182764deae5895d479ec1b6fe6ea14ee927513bc2d00f7599657d1e7dae172. 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/HUA251256003.
Classical Persian improvisation on the santur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338e24db32729eeccc4fe62cdf35b636c88108859c3b3c037d075ceb5fd6cebc. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/HUA251256004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6739505a176edd3c0015d38e1cb09826dfcabfd5257ec0fb79ad2be1384eb8a9. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HUA251256005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fd86ba4d344c49be919cf1471c33a3963f3cefbec5eb63b4fe2521174cb811. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/HUA251256006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5895c6b44b5c3d859a1b411af1ca35819a7cfc3a647cdab7172117ee56307dfe. 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/HUA251256007.
Solo for the ud, Arabic music from the Sultan's court
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed59436de2cb070033c2639b59ddf6f0b08ded93a0a5418590fd1688739ef74. 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/HUA251256008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bac23631f448082dabf0b50babff558e46cb7d084fa4b90bd816c0032fc1e5c. 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/HUA251256009.
Poem in Hungarian and Turkish by Balint Balassi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb03a407847766dc9e8af1369ac0da1b91311ca9ec0bbd591258bb7d6c1aac6c. 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/HUA251256010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189aa7ad5018305653d6801cc3748c7bc39bb49eca78ba4a1d0502ea6e94e141. 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/HUA251256011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bfa0fd7701e76bdc733f3b8f1a4613edd52d8bfade1d0f364fab7d05e4a480. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/HUA251256012.
Classical Persian improvisation on the tombak
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e59d09a48258bcda41fca1b465012214c6c9631386a34927b1ed0b970610851. 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/HUA251256013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a89e41aea604ab6d09ba1463e8993e250ddf2a993d95cbc2f0e1d4367ce9af. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/HUA251256014.