Vladimir Ivanovich Martynov (Russian: Владимир Иванович Мартынов) (Moscow, 20 February 1946) is a Russian composer, known for his compositions in the concerto, orchestral music, chamber music, and cho
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 0x68695b07cb4b3ab1b25a7c2d095ce7eec7fcd928af407cdec5f4cbe8c64b9680. 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/d2417acb-6ffa-4b20-ac46-9376cb093764.json and https://artists.proofprofile.net/proofs/artist/d2417acb-6ffa-4b20-ac46-9376cb093764.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x878ec04d82e376128b3d4d14fd53f77cce36c73e3dc6bedbb072ee841831f22b. 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/USNO11100354.
Vladimir Martynov: Schubert-Quintet (Unfinished): Movement I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e0ce4ecba7ef0c51fff88d3960e90e6b3fc9a3464280891a0128fc260693f1. 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/USNO11100355.
Vladimir Martynov: Schubert-Quintet (Unfinished): Movement II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf6699cb57628186be8ef4514eb42916137aa5ea059de858d4c87ad5aded82c. 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/USNO11100356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55501326f8cba6bbf14687ce2ef92841b91f1b3d35eb6be5ad5ab497cb2555a5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USNO11100357.
Classical Treasures Composer Series: Vladimir Martynov, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4485e102897b35c626fec6c4ae7d198e6200cd0078800b0f88ad2a7ba0d452d9. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/TCACF1515157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1540e69fd1f47e715f827b08f2e42b044a70857a83e1dd2729e981d5254db5bc. 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/TCACF1515162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7953ecda21e7e45ebba1000e3e73b89cd072465cd11f1e3fe317fe87e8bb5e5b. 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/TCACF1515163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71265831879cee4d3a3fdd5ae4e6fcafcf24d6c0b46d7acecc714a3420533b4. 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/TCACF1515164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902ae8546099e158ee12f407b2b203a8bb3889ab88dd7c65041bb5f24efa5fb6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACF1515166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf68638903db08b459ba1895a2f26d94aceb086ce464bf2dd26a346170277f4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCACF1515167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3520151e0ff56f4cf4adb1ed32977762dca6f4db2c7da4be4fa951baad19ba6d. 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/TCACF1515169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8719ee37d5bde8921767fbf976deb8008cc2857ece2b98b2fb335886de35549. 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/TCACF1515171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c5129ec453792798ad3d2da6d16d8a12c5d4bdbd2acc561b349c0a93f91017. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACF1515172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbffa30f9e9c947521c691fd6010ce3f579bf18ad0405c53ac7214fc9396ee62. 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/TCACF1515173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98627e7e4d2dcc6f9117ac8f283e0381e6b3615ba50e927fb63d49efff5debf6. 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/TCACF1515176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f4b2287fe2161bea79861b62be664ea79f11b94bc8bb48f8e703c12575f4b2. 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/TCACF1515181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c230606b7a6d3684cbb18b32a545c097e3ae6f27f6aae219aaab330e3edda4a. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCACF1578560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe9d162438932ebf2dccb9d208d0c86216e97238e98cd06926cf836c38b74ce. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DEA711800008.
Владимир Мартынов: Соната для скрипки и фортепиано
Vladimir Martynov: Music for Tatiana and America
Vladimir Martynov: Canzone for 2 violins
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf2baf61e05802f1c6ccaa6beb8e3f41cb52b43b8ea890213d28da902f6f960. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEE861903698.
Christmas Music, Pt. 1, Book for Instruments: I. Prelude for the Star and the Three Knights
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe17eb2fbd08a29b6a46522e6d34fd2c7dab059f7524f1c3e6edc8920b45429. 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/NLY332102690.
Три стихии (к 225-летию Александра Сергеевича Пушкина)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e613db46e84c7e5cd29ec36ecfef0f41261830cf742cbe3f7349b998828b5ca. 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/USNO10058207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00bc4719d9e2e85772abfed696c172b6102deb23b3fc0cc4491672be53ec5e4. 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/USNO10058208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa22f5677a0010a92f627c724cb269bcdc74dace5e3d3bc78c342b2ea3c372ef. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USNO10058209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e336ca298b9adf6884793f97dc2811472bcb79b7bb917e59c8f156f37308245. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USNO10058210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd349a6af6f8061962f1b3061bc7cb0eb4434b252a2f4bd047917acc2f57437. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USNO10058211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7decca78ae483f7738ea957d4da12a3a6267f5c659748bb844785cce31e4d561. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USNO10058212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bd7a2084a4c5a814d69ef871c430cdfae867faabd5fc804da27b41fea5555d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM11352604.