thumb|Sergej Larin Sergej Alekseyevich LarinIn English, his first name is also sometimes spelled as 'Sergey' or 'Sergei' (; ; March 9, 1956 – January 13, 2008)Obituary: Sergej Larin, 51, Russian Tenor
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 0x92d4bda16cf556f8bdc4055aa93ede1a67d5658ba063b42e87883673277b562d. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90faf078-e0ed-43c9-a186-f3c1ba0aaaf1.json and https://artists.proofprofile.net/proofs/artist/90faf078-e0ed-43c9-a186-f3c1ba0aaaf1.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Lady Macbeth of Mtsensk District / Act 1: Akh, ne spítsya ból'se, popróbuyu
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 0x5db02326b42c9cf0d67b5be91de43c5ece9167f04375d418acbd0329421ec7b6. 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/DEF059231201 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 2: Sergéy, Seryóza! Vsyo spit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1274da418715921c5a38d754ad24d12b6983916f89920b44bfbeccab4139ae9. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEF059231216 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 1: Gribkí segódnya búdut?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7125ad97d309657f26ee3fb55dc87559528be642de8042a4be5aa03eaf0548ad. 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/DEF059231202 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 2: Opyát' usnúl - ... - [Andante] (Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaad2f8a2d281ad33410cc0ecee47a5c17c5f276d382da3e89a52d56ab776db6. 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/DEF059231217 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 1: Govorí - ... - Cegó vstal?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d66e272bb240e64912498333840c9bb174d1effa4e32e933b0e5d760c8655a. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEF059231203 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 2: Slúsay, Sergéy - ... - Tepér' sabás
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd1bd35d6095d5e50a6c1d48670c9b498b4d621579df6719620a7a1e2816299. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059231218 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 1: Interlude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d77dbb7a9f364bb324b5ad65ceda8c2c4ff176ea3504e282517589cbafa0b4. 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/DEF059231204 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 3: Cto tï - ... - Interlude (Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69de2ef80db1b7eb34d566d2947caf8b695084b485bb81b933882b16592fbfe4. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059231219 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 1: Ay! Ay! Ay! - Otpustíte bábu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94630f9fec991823e5eb704f7487fe38f6d3aa49152663fb36f3942a613f013f. 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/DEF059231205 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 3: Sózdan policéyskiy - ... - Skóro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfb703dedd9947681249de38d2ef20d1c0db1304552c18e3b6d3d98fe960a66. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059231220 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 1: Mnógo vï - Cto ego?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06a9d5bb8628e7252c2c24d969e24dcaa5a7efef18a77878cc7f9c613109b22. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059231206 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 3: Interlude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4030b4d3ec24f0c8b72ee2da2dbbc2e41e9c11499aa165d4cd2e4b6d8249af. 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/DEF059231221 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 1: Interlude (I)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659bd75858620bb9ecb3fa61401e8e3349d9857626b0e6b362b22f4e67d4e30b. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059231207 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 3: Sláva suprúgam - ... - Cto takóye?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd585652b2da12b7f8003d2125d23e3d9b44fa552dbb13c667077536302cda940. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEF059231222 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 1: Spat' porá. Den' prosól
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a6a6967cb147fd3346060caa03284a12f5eead3420c7e9e5b1f4e798febbb4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEF059231208 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 4: Vyórstï odná za drugóy dlínnoy polzút verenícey
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34be15cbc56c29dc60efa1d94780bc9363ee773a483e7ba81a8b1fd55df2e355. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059231223 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 1: Zerebyónok k kobïlke torópitsya
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0dfa28fd931af7670753a79492798d710d5817a4ce9cef4070c0b91df23141. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEF059231209 — a six-check JSON result.
Lady Macbeth Of Mtsensk District / Act 1: Kto eto - ... - Uydí tï
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cdd9334a9288263d559075f2e11e16d7abd37a58fb6071b1351e9e6b7a1688. 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/DEF059231210 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 2: Cto znácit stárost': Ne spítsya
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947e367bb962110ad716dd8df2e4238bed9e344af6ddcc749d7b790d2a44d4fb. 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/DEF059231211 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 2: Proskáy - ... - Smotrí, Katerína
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450ca2128beb56c677ec0cad35856e93f6163320e9ef6e276f7e8fdaeb7a9155. 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/DEF059231212 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 4: V lesú - Znáyes' li
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51a9825416bc1d80c74de45d776202793f67cac091e78b5528ca35dbc2d2213. 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/DEF059231227 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 2: Ustál - ... - Progolodálsya ya
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff0ac67f86ef9a1d2e675b5e6bde636fc57db19f50c6698e1c97a7195fe6632. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059231213 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 4: Vstaváy! Po mestám! Zívo!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54741f2759c53e31ff09b5e2662651038b68899e87e3a4ebc9026748e96396d8. 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/DEF059231228 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 2: Vídno - ... - Akh, Borís Timoféyevic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c24acaf2462e0a29a4fb34f433552d124fda29816b57918fba2a06413166de5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059231214 — a six-check JSON result.
Lady Macbeth of Mtsensk District / Act 2: Interlude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2334879e1f101e47e44f0d66f228bf41e4b324b17a65236bb540e894a0f505. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059231215 — a six-check JSON result.