Alexis Kossenko (born 1977 in Nice) is a French contemporary flautist, conductor and musicologist. Education Kossenko followed the courses of flautist Alain Marion at the Conservatoire National Su
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 0x2349bca289f195c97a418702a0f29662f614198322fbda17d14260e57fba5a6a. 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/df7a556f-9093-4386-89e5-8ad1054b642c.json and https://artists.proofprofile.net/proofs/artist/df7a556f-9093-4386-89e5-8ad1054b642c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Magnificat en mi bémol majeur, BWV 243a: "Deposuit potentes"
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 0x1298d1d2c57a43cfdf860b61ae9e867ca2170a869f21f1d379dac28f2b439bb9. 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/FRZ051500713.
Requiem en ré mineur, Op. 48: "Pie Jesu"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59174fe6a0c669a520b805dd19a886a4c096586f69d20787eabb2cb53e3652e7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ051500714.
Passion selon Saint-Matthieu, BWV 244: "Erbarme dich, mein Gott"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1c40e944c447ca2319f7d6a0be751cbe6accc503cd8796f380057b1cf30314. 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/FRZ051500715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00578b11d0a906ffa3fa8a7998c3a7a17589ef5cd8590d73d4ceedb97df895ea. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRZ051500716.
Magnificat en ré majeur, BWV 243: "Et Misericordia"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09beffa787e2c73b20b553d41e4f5826260f3853d4eea512995131d8b1d880e1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ051500717.
Agnus Dei pour choeur et l'Adagio du quatuor, Op. 11: "Agnus Dei" (Arr. for Cello and Strings Quintet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2db05dd441306f05efd21284626ea80b49f0f2ad193a7b598ca5abe5f47bc3. 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/FRZ051500718.
Stabat Mater, P. 77: "Stabat Mater dolorosa"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8511ced5fd6cb1020a531b4ea81da497e1d722cc2341d70744a3e3a843a3c72f. 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/FRZ051500719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf9eb693ad5a8888908a6a0de976db2460781e3e40cb851cc92e488ad9bb604. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRZ051500720.
Stabat Mater, RV 621: "Eia Mater, fons amoris"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5e687809282081432cbcc2ae26a9e24bfd2074d2ef682da0aead2611e4858b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ051500721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0382afef775326cf5ece58638dccf056897eebfe3355bd855161d6802eb5f742. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRZ051500722.
Stabat Mater, RV 621: "Stabat Mater dolorosa"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991c35af40b5a4de331274e4fa666a8b81ea87dac3da1f242f8dbd6189b259e9. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/FRZ051500723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c97b2d7ed0565afba64deaa535758e06926cc100902b61afd9314c806a6bec. 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/FRZ051500724.
Choral Prelude, BWV 639: "Ich ruf' zu dir, Herr Jesu Christ"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f87e674130ff34aaee31630f3cd00606426c4c3182dfeab4e86ec3a144050a0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ051500725.
Dixit Dominus, HWV 232: "De torrente in via bibet"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e8a1548cf0c2e2c7649495b3392925260c7b440dfde9af2a20baa679bed20b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ051500726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51654c02f08357ceb65fca7d0d067cfc9c4563161929915117ef25a0364e82c6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ051500728.
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 0x1f470d3b15dbaa3f9ac18bcde8fbc9d6e86044454b2197f61935405f317ddaf6. 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/FROV61820918.
Le Bourgeois gentilhomme, LWV 43: Marche pour la cérémonie des Turcs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0400bc5592e55812238109e3a4436b005d31d0f3d67d3a004acc3aa47004da. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FROV61820923.
C.P.E. Bach: Concerti a flauto traverso obligato - II
C.P.E. Bach: Concerti a flauto traverso obligato (Alpha Collection)
Per l'Orchestra di Dresda, Vol.1 Ouverture
Il serpente di bronzo, ZWV 61: Potrei sovra degli empi (Dio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b83b3a643889afe5b54619e0348c05c22d486f4fa62fc9595994c3c1defb14. 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/FROV62125802.
Rameau: Les Indes galantes, Quatrième entrée "Les sauvages": "Forêts paisibles" (Zima, Adario, Sauvages)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee9c274a3a4f959f51b7a55aa1793bea0e57489ef9d85fe256ae653907659e0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBAYC1302318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2db05dd441306f05efd21284626ea80b49f0f2ad193a7b598ca5abe5f47bc3. 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/FRZ051500718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee9c274a3a4f959f51b7a55aa1793bea0e57489ef9d85fe256ae653907659e0. 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/GBAYC1302318.
Les Indes Galantes, RCT 44: Forêts paisibles (Les sauvages)
Ich habe genug, BWV 82: I. Aria. Ich habe genug
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710cc51c91b71a04f167319d32b2553243fe5f77d221005f20df2e97be055daf. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBAYC0802293.