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 0xb5da5e29f7f11df10fafb72f9038db67a0bf0d38a9690098ef46fbab4abf79f9. 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/7f4a6c97-d745-4542-949c-2eb4c70fdf50.json and https://artists.proofprofile.net/proofs/artist/7f4a6c97-d745-4542-949c-2eb4c70fdf50.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Opera and Operetta Arias: Kincses, Veronika (Soprano) – Kalman, I. / Lehar, F. / Strauss, J. Ii / Zeller, C. / Huszka, J. / Planquette, R.
István, a király, Act III, "Koppány vezér": Te vagy a legszebb álmunk (Koppány és Feleségei)
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 0x8043247919728e2b0dca5df5ea66f7668257402b7e25cbbc0cd18f48703c021b. 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/HUA251413402.
István, a király, Act III, "Koppány vezér": Abcúg István! (Sur, Solt, Bese, Koppány)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6721519b89dd48743633a75f5d2daaa190704f421cd4827a91dd3a8bcf2c47. 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/HUA251413403.
István, a király, Act III, "Koppány vezér": Elkésett békevágy (Réka, Koppány, István)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1543908a2c87bf58e0f18bae767da2ed537b400963f579bd6bef9574b6888f. 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/HUA251413406.
István, a király, Act IV, "István, a király": Hála néked, fejedelem! (Fourak, Lovagok, István, Asztrik, Sarolt és a Nép)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31a5d907646615d6dd8caa85afb9a0774238d473c4180e9e67bc0bab8c05975. 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/HUA251413409.
István, a király, Act II, "Esztergom": Abcúg Koppány! (Sur, Solt, Bese, István)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093c1891e36daa87be7c18f64fe9ce129b12a410ebe92db6ae6e289db78d7084. 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/HUA251413310.
István, a király, Act IV, "István, a király": Halld meg, Uram, a kérésem - Felnégyelni! [Réka, István, Sarolt, Lovagok
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df1a8c2196ba54424ed790950914ab018ffe16a981723763fb47ae19ac79588. 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/HUA251413410.
István, a király, Act II, "Esztergom": Oly távol vagy tolem (és mégis közel) [István, Réka]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76a88f0d0a1fe50bb2d19bcce0a46598fa35531390ef8b533c7ca27d83186bb. 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/HUA251413314.
István, a király, Act III, "Koppány vezér": Szállj fel, szabad madár! (Torda, Koppány és a Nép)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002e87b61c65bc8e2f7d5a3b746aff7d33f0f7106b42ce85216f055d566baf62. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:33:29Z), 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/HUA251413401.
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
István, a király, Act I, "Az örökség": Te kit választanál
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79d091dbd0447226f95eab0ddf4882b005c054903c3885487aef1b7e2f20168. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/HUA251413302.
István, a király, Act I, "Az örökség": Töltsd el szívünk fényesség! - Veni lumen cordium (Asztrik és a Térítok, Gizella, István és a Nép)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79815f324bfaa399616851441cc50ac92220e72e35d31cba4202c517ae582e48. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HUA251413303.
István, a király, Act I, "Az örökség": Gyarló az ember (Sur, Solt, Bese)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa717dabd1b52e1061fcbbd9c5a888c5133013c0028329af7ea5c8db6465f701b. 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/HUA251413304.
István, a király, Act III, "Koppány vezér": Szemtol szembe szembe (Koppány, Torda és a Nép)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b1ca171652b0facf03e196616d36e205afdad8423cd66a84cbabbff24b1dac. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/HUA251413404.
István, a király, Act I, "Az örökség": Nem vagyunk még hozzád méltók - Nem kell olyan isten (Réka, Laborc és a Nép)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052e32116d98bd39e63d78df10a82a9a5869e3a922f85fc36899d6da4284c4b8. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/HUA251413305.
István, a király, Act III, "Koppány vezér": Áldozatunk fogadjátok! (Torda és a Nép)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d452b7945c3b4559116355d55d44af0bec08c7bd7be722914e485e907b2fee. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/HUA251413405.
István, a király, Act I, "Az örökség": Géza fejedelem temetése - Kyrie eleison (Asztrik, a Térítok és a Nép)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ed376b73c43ed413b7c57d951c46fae60e5710f753e0cdd6223d1edd27d5a6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HUA251413306.
István, a király, Act I, "Az örökség": Nincs más út, csak az Isten útja (István, Koppány és a Nép)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d31fbc756f79a4ab926f18e383178b327876a45ffec4740cc9f30c0f41b486. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HUA251413307.
István, a király, Act III, "Koppány vezér": Véres kardot hoztam - Vezess minket, István! (Torda és a Nép)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f78b39c482139cedae3daa83becf059e959de204ae12c52ea2a3540bf19c67. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HUA251413407.
István, a király, Act II, "Esztergom": Adj békét, Uram - Da pacem Domine (Réka, Gizella, István, Asztrik, Pázmány és a Nép)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a12f1d6c6c760addaed358b5811c634918d9cbebf3e0a0d51dc6165583535e0. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HUA251413308.
István, a király, Act IV, "István, a király": Gyászba öltözött csillagom - Töltsd el szívünk, Fényesség! (Regos, Asztrik, a Térítok és a Nép)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181c860f9b40f3d023a517459bbb149529712cc4872c831fd4f70aca0c443eb8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HUA251413408.
István, a király, Act II, "Esztergom": Üdvöz légyen Géza fia - Koppány küldött jó úrnom (Regosök, Sarolt, Laborc, Sur, Solt, Bese)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dab782b01a7c0360672e9efc370584df92e2e871c91fb4761c016d6cd863d44. 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/HUA251413309.
István, a király, Act II, "Esztergom": István fiam (Sarolt, István)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b20952db7a09550b89e93dc0c3ce85080fce1c2cbca97714094ab7bb9df0d7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HUA251413311.
István, a király, Act IV, "István, a király": Oly távol vagy tolem (István, Gizella)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d33251a0515f10acd815e493986d1e815c767966223bc10499dfc145370faab. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HUA251413411.
István, a király, Act II, "Esztergom": Unom a politikát (Gizella, Vecellin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ed83e11a67b162445f35b3d1e7a903402d49a3ad6cf97a987ae3fe1ff3d832. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/HUA251413312.
István, a király, Act II, "Esztergom": Fejedelmünk, István (Asztrik és a Nép)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4808a2a92dadedb546ff38d99ced58fb0e5e213b74670d7ccd348be3089728e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HUA251413313.