Vahan Mardirossian (born 26 May 1975, in Yerevan) is an Armenian pianist88 notes pour piano solo, Jean-Pierre Thiollet, Neva éditions, 2015, p. 53 and 332. and conductor... Life Settled in Paris i
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 0x82b79d77449b2acff85481e1a8cc070996e064832657bbd1b1e71bfb449691ab. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8fe6ab6-0346-4d5e-af35-0f87d431dcbb.json and https://artists.proofprofile.net/proofs/artist/b8fe6ab6-0346-4d5e-af35-0f87d431dcbb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: Complete Divertimenti & Serenades
Divertimento in D Major, K. 136: I. Allegro
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 0xf621e5edeb81ef246b7349918dab5cb04a5d9d0e1e90a86396579b95e320817a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331410429.
Divertimento in F Major, K. 138: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b45cc478e4a261fae973beb2f3dde8eaa0a0432004c485b6f3f823b39e3e72. 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/NLY331410436.
Divertimento in F Major, K. 138: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fc05e0b758bb4f8bd578f62a0c6d676d659a737c9b8f31480b8e1be492bafc. 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/NLY331410437.
Divertimento in D Major, K. 334: VI. Rondo. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2873a297fea97ecaaa281977d88a4e47f3dd621d37706d2c83e62680b8e7419. 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/NLY331410443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2972115f03771a988178819c4f1bb87a0a6a2101db74d748b3b25a575388074. 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/NLY331410444.
Notturno in D Major, K. 286: III. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02acf8069681fa635078226e841d03d403c2aed29004e2404a42e03e93df898. 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/NLY331410446.
Ein Musikalischer Spaß in F Major, K. 522 "Dorfmusikantenssextett": IV. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661e6e8e519da63f5641315b88e19c6ccefdb3f385af0ab892f6f66193de471b. 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/NLY331410450.
Serenade in G Major, K. 525 "Eine, kleine Nachtmusik": II. Romance. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1b33efe44933a07c2c01db252194c7bbb0fca1b35521ac86a32a0d1b111dc0. 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/NLY331410452.
Serenade in G Major, K. 525 "Eine, kleine Nachtmusik": III. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e5afdaa44708a3b363e31e2fc9d9a1cc00729fa83685899e89e4d5508b457b. 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/NLY331410453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16f3316bb2926163ad55a4dc232fc1b1104a49f43f9041916c547e7b2d14bac. 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/NLY331410455.
Cassation in G Major, K. 63: III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a09a222798578f389ec9cd8b051ffab8dfa506c43adab9b11ee70463722d641. 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/NLY331410457.
Cassation in G Major, K. 63: IV. Menuett
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7687eb3fe9c69ec5774885c1f1c18adc952a949e0cd3b28cd38fa48e71e4ce. 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/NLY331410458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf96c634d698edd799dc90147ff1d2324a98ce1c2bf5df68472099d7aa61c8bc. 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/NLY331410459.
Cassation in G Major, K. 63: VI. Menuett
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592967ddca77667ee5696c8b704884754f09d8de1f9480c718f1d4a9d7f91164. 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/NLY331410460.
Cassation in G Major, K. 63: VII. Finale. Allegro Assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5be686f11e1f8f50224addc5a0bd0db258ce57fc5b3d3622497587e88e8baf5. 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/NLY331410461.
Cassation in B-Flat Major, K. 99: I. Marcia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a392bfec51b964682496ea65f265c3b204938ad1c1b52f8a8afec55c238d7e. 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/NLY331410462.
Cassation in B-Flat Major, K. 99: III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65e1fa52fb426e2050eb92af8f5e9ff1747e7f43b6e0db7ac4f9bbddc59eba6. 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/NLY331410464.
Cassation in B-Flat Major, K. 99: IV. Menuett
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815dd889cfa393a738e5d868733c1e52aed8fe7308069d7be98e68095b5fe9a9. 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/NLY331410465.
Cassation in B-Flat Major, K. 99: VI. Menuett
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c3ea3dd94bd34ea0d463b5abc170c22bdd6b644a682cd61c7fcc9b3437439f. 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/NLY331410467.
Cassation in B-Flat Major, K. 99: VII. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2132936cd24f7a323b0891d40be7153013bca73aefd7a976dc01fa4a2e854617. 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/NLY331410468.
Divertimento in D Major, K. 251: V. Rondeau. Allegro Assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b129a3fe8fa5dfe260f2595d915274965cfca30f4c31508b1acb896c2532e9. 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/NLY331410473.
Divertimento in D Major, K. 205: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc6b51db341cdbb65a223aa5e75fb2f5823c89c14ad643c0c5dfa0518400dc7. 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/NLY331410475.
Divertimento in D Major, K. 205: II. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a81b335f6d52a76833574210e238ce8710320e957e30fd5379ffc2a834f4599. 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/NLY331410476.
Divertimento in D Major, K. 205: IV. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69de21771b915a5c01a1fe7ef7d180bb0f271f8c3a21fe931693eb84f1262039. 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/NLY331410478.
Piano Concerto in G Minor, Op. 33: I. Allegro Agitato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a715cc06adf707856a46b64add410080ab535a616533e4e9c44c5c2f8a4cf8. 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/NLY332300497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404f696b9262da233dc46f13a4e66c0cb7ea660751b0701a59299bc25ee01928. 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/NLY332300500.
Piano Concerto in G Minor, Op. 33: II. Andante Sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86df135bcacbe3fd94153710db46b59f92c3cffee8b5569ef5babf82398e344c. 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/NLY332300498.
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
Piano Concerto in G Minor, Op. 33: III. Allegro con Fuoco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8906f9b914e809a1a4cb41e82826d5307da556549458e62beab561157b9eba. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NLY332300499.