Aigul Akhmetshina () is a Bashkir operatic mezzo-soprano. Early life and education Akhmetshina was born in 1996 in the village of Kirgiz-Miyaki in the Republic of Bashkortostan in the Russian Federat
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 0x26cfa2cda40e34dde8ad8edce9bac8d3231c32c6d91d907a7fbc925e2f8c0066. 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/a2219e3e-daed-4657-b91e-ceaa693b4fd2.json and https://artists.proofprofile.net/proofs/artist/a2219e3e-daed-4657-b91e-ceaa693b4fd2.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Carmen, Act I: Habanera. L'amour est un oiseau rebelle
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 0xaded6a08043b08129e88384ebce9f5e4030ce22f8ecb8c45a7576a2dd78b40e3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2400361 — a six-check JSON result.
Carmen, Act I: Seguidilla. Près des remparts de Séville
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd167b02c0a1590adde93e390cf66d6fd4676dfd34c683f19b697111675f7237. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2400239 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e7e709eee4cf42182fdd4e66844f039db00b4f9fc53c51e580531cbe2084c3. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2400362 — a six-check JSON result.
Carmen, Act III: Carreau! Pique!... La mort!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf28c67988287732038e1ac64c990d91deb91665a558ef8b37b9c671322f52d7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2400363 — a six-check JSON result.
Werther, Act III: Werther! Werther! Qui m'aurait dit la place...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8811c20d095171d13ac56d6b97d97490f26e395bc4159076753efdce18006d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2400364 — a six-check JSON result.
Werther, Act III: Va! Laisse couler mes larmes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567e1520e09ad9a8f111a191ca510f6b1babb2c80f7f93e8c9e346e642c534b4. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2400365 — a six-check JSON result.
I Capuleti e i Montecchi, Act I: Ascolta! Se Romeo t'uccise un figlio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293b85a71ceb9e0a59a773ed15f9ab92ab929b9117c95d10b8b5c100a5ee178b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2400366 — a six-check JSON result.
I Capuleti e i Montecchi, Act I: La tremenda ultrice spada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653abaf24588db23837280445c320fd351460f9791946cceba15d74ef9490fe5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2400367 — a six-check JSON result.
I Capuleti e i Montecchi, Act II: Deh! Tu, bell'anima
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842d6e4f6dc70d568d06b02ea8c7b67d3db09c444b402b9c82700b144d180618. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2400368 — a six-check JSON result.
La Cenerentola, Act II: Aria. Nacqui all'affanno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe12e943c26363df08e90ea737d02243d07cd8f991f4a7ef197550a78c99e4e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2400369 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdba2ecf585d6b7c377d1f1ed769e36e87648892bdbac15970cb90617749434. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2400370 — a six-check JSON result.
Il barbiere di Siviglia, Act I: No. 5a, Cavatina. Una voce poco fa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ead72853a57d1a9d243cc0da77797ad8ac150e956ea0a4fb43eff286755e10. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2400371 — a six-check JSON result.
Il barbiere di Siviglia, Act I: No. 5b, Cabaletta. Io sono docile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170d639f8ba8530e8de3ae802dd0b218e71524a21646ccceb73b511f4e7030c9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2400372 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368f2420e65c16e98a8f3738cfdaccd8cfac9dd756b571be58f1f68b930676e9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2400237 — a six-check JSON result.
Carmen, WD 31, Act IV: C'est toi, c'est-moi!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f341c732ea24ce44dd9927937f983c346c7b762b5fa5248d4444f068cfb1a2. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2200330 — a six-check JSON result.
Carmen, WD 31, Act IV: Viva! Viva! La course est belle!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bc1f4d1e898143dbbb4e1f3230c4a0304d39d165367fd1a81e50ca07c145b0. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2200331 — a six-check JSON result.
Rossini: La Cenerentola, Act II: Non più mesta
Bellini: I Capuleti e i Montecchi, Act I: Ascolta! Se Romeo t'uccise un figlio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293b85a71ceb9e0a59a773ed15f9ab92ab929b9117c95d10b8b5c100a5ee178b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2400366 — a six-check JSON result.
Ann Patchett’s Bel Canto Annotated Edition - Official Playlist
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0de730147de43c61f0e8d54e7fc3650a4e639fc5d08c3f72390763b4f61d1e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2400050 — a six-check JSON result.