Christophe Coin (; born 26 January 1958) is a French cellist, viola da gamba player and conductor active in the field of historically informed performance. He is the cellist of the Quatuor Mosaïques a
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 0x90347207d7d89535bb345b9896eade0b87f42b63b570d67b47b6efcfe567754e. 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/95fa8ca1-a69c-4f86-b241-883989bdb11f.json and https://artists.proofprofile.net/proofs/artist/95fa8ca1-a69c-4f86-b241-883989bdb11f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Sonata for cello and Continuo in B flat, RV.47: 1. Largo
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 0x141b8684eb09aae6336f1de6f761b0c0a1a1a41803a9f07eb70eb802cd2a4b58. 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/GBF078710831 — a six-check JSON result.
Sonata for cello and Continuo in B flat, RV.47: 2. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f847c78ce57cae252ea69d5983a6ffe4a43b1f0049a4a175a21d6a680cd2ac. 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/GBF078710832 — a six-check JSON result.
Sonata for cello and Continuo in B flat, RV.47: 3. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc868b7323e5b4e4304f64843b50005d29399ba14694dfc2457ddf8b023ac803f. 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/GBF078710833 — a six-check JSON result.
Sonata for cello and Continuo in B flat, RV.47: 4. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5808a1d5e28ac1022e3cf7506b6aea21bced6e5b87c22bd4fe2cd68eb4dc8a2. 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/GBF078710834 — a six-check JSON result.
Sonata for Cello and Continuo in F major, R.41: 1. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7101de884c32b892f3d2a50deb10fdd501e2c7ad48c624a97358275871b8f3. 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/GBF078710841 — a six-check JSON result.
Sonata for Cello and Continuo in F major, R.41: 2. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ec0749b293b2f71b2724b400941e9cdc2f69d5bd7a79dba5b2497d24850bb5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBF078710842 — a six-check JSON result.
Sonata for Cello and Continuo in F major, R.41: 3. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce9b5fef3686d5c055e119afa492ab6949b90dbdefe9d3edf7528a6c86eef28. 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/GBF078710843 — a six-check JSON result.
Sonata for Cello and Continuo in F major, R.41: 4. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1555210a2b740fa7d2a5eb1a74bd7f2aa5acce20c42b2b05ba9a49777ef08fd5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBF078710844 — a six-check JSON result.
Sonata for Cello and Continuo in A minor, R.43: 1. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915b031946cae5c5cc0656c8eb65f9fe432d025cb66b2e92822af1ee54c675fa. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBF078710851 — a six-check JSON result.
Sonata for Cello and Continuo in A minor, R.43: 2. Allegro poco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12d9e62cf92b481814cede59bcc4a0e5b35bb0eda65818e982fab395419c1dc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBF078710852 — a six-check JSON result.
Sonata for Cello and Continuo in A minor, R.43: 3. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5de2bb41cec00c4de8d84b8f38a137f3d8aba75f7614f42764df223202247e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078710853 — a six-check JSON result.
Sonata for Cello and Continuo in A minor, R.43: 4. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8c2b894209bb26d54004a4764b44305a2e456d07fc296803f256fced0f1ba9. 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/GBF078710854 — a six-check JSON result.
Sonata for Cello and Continuo in B flat, R.45: 1. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5aaca1188378a1f1981794ab39519f7968a6bbcd117dc2234cd01f8aa1df9d5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078710861 — a six-check JSON result.
Sonata for Cello and Continuo in B flat, R.45: 2. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c048ac0111eb32665937d90d09c71ede0957f8b526ea129c2015d5fa00ab6c. 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/GBF078710862 — a six-check JSON result.
Sonata for Cello and Continuo in B flat, R.45: 3. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d465397cfbb3989005fe31f23ce83ee3009eaa232d100070a8787884417b4cb. 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/GBF078710863 — a six-check JSON result.
Sonata for Cello and Continuo in B flat, R.45: 4. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4420155e1aa4cabd45814aa0eb293cadf95d1bfeafe40ffc459ec1bfc5e0f151. 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/GBF078710864 — a six-check JSON result.
Sonata for Cello and Continuo in E minor, R.40: 1. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadd5f48da76c23a97be5d5620e3c552a5240f6da6042ed1bf2978cc7eb4495a. 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/GBF078710871 — a six-check JSON result.
Sonata for Cello and Continuo in E minor, R.40: 2. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2074fc1252df13a552f3c468007c2cad8810d051724ad263a53f8bf326e6cd73. 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/GBF078710872 — a six-check JSON result.
Sonata for Cello and Continuo in E minor, R.40: 3. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5978c81b46603453e2ce4ae58dc22be1c7f594893750d468ef565b51fa3025. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GBF078710873 — a six-check JSON result.
Sonata for Cello and Continuo in E minor, R.40: 4. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bdd7df108492fba92acd8c21493128aa01a849a2d88c7c68c2f97bae5f710d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBF078710874 — a six-check JSON result.
Sonata for Cello and Continuo in B flat, R.46: 1. Preludio (Largo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d66e181d9f53c5e6422560363485da66edec2b3186deeb79969cf066df43e6a. 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/GBF078710881 — a six-check JSON result.
Sonata for Cello and Continuo in B flat, R.46: 2. Allemanda (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf578225401f24c6dd5334524a63134241092e7ba5092db60932c06a716b195. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/GBF078710882 — a six-check JSON result.
Sonata for Cello and Continuo in B flat, R.46: 3. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b14dbfe32af5cdb2f2cfe5f5fec9ac5c9a3227cadeb08a84023dd66429099c4. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBF078710883 — a six-check JSON result.
Sonata for Cello and Continuo in B flat, R.46: 4. Corrente (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3244ef7dc045d7d38ef060724181ddaabd8848c4361dec6a39fc6d993ab4e4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBF078710884 — a six-check JSON result.
Cello Concerto in D Minor, RV 406: 2. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529a2d2f7f2a3542eaa32676f0b8b2e577a6b32890b8a5b26be1eb4db3108a49. 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/GBF079043202 — a six-check JSON result.
Cello Concerto in D Minor, RV 406: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433e20bded8b9d4704d6682a9d4d3f181109305a06cfb26e3752d0e9884c966c. 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/GBF079043203 — a six-check JSON result.
Cello Sonata in A Minor, RV 44: 1. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60be5b48d32bfb8af581282fc07e1e2cf93d0a2c0ae84431c24f409c80d08eec. 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/GBF079043204 — a six-check JSON result.
Cello Sonata in A Minor, RV 44: 2. Allegro poco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1e4dd4d010db8032c04ae35605a87fb8cf8314f8aa14e65368dc5283435d03. 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/GBF079043205 — a six-check JSON result.
Cello Sonata in A Minor, RV 44: 3. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67a4d45f7b76bde138b134f541748ec6f9c7a0f104d3b7bd724d2ae2e2669ae. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/GBF079043206 — a six-check JSON result.
Cello Sonata in A Minor, RV 44: 4. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0fc0865fdd2c05f5bb972292927f8a7e1cf89a83553317d15fd57c0c555591. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBF079043207 — a six-check JSON result.
Cello Concerto in C Minor, RV 402: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb9f6c1aaab86cdf36636dcfe121d99f8ec804f6cbbd967f78e4f46d46919fe. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBF079043210 — a six-check JSON result.
Cello Sonata in G Minor, RV 42: 4. Gigue. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928a5a33ffef091722d3586dec682f8cea96421f12ef609437210ae41fb2fc95. 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/GBF079043218 — a six-check JSON result.
Cello Concerto In C Major, Hob.VIIb:1: 3. Finale (Allegro molto)
The World of The Academy of Ancient Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48da515ca1f852dd49cbd4cfcdf71cc0ad8262e3a2c1019bde13fcfd0322d1c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBF078210003 — a six-check JSON result.
Vivaldi: Concerto for Two Cellos in G Minor, RV 531: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78ccfb3cb326f228da07825fd88d47077adc49da57c9bc947f4f67174a924e7. 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/DEA809599458 — a six-check JSON result.