Lionel Bringuier (born 24 September 1986), Nice, is a French conductor, cellist and pianist. Biography Bringuier is the fourth child in a family of musicians, including his brother Nicolas Bringuier,
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 0x05177c1fe2e4c58eed4cdd4956ca7be12246fa4e43575c2dc66b700bb98dc62b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3c0d9da-34a4-4416-8506-3afc53c9198e.json and https://artists.proofprofile.net/proofs/artist/c3c0d9da-34a4-4416-8506-3afc53c9198e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5846676b26b5475c01d8793208abed12b81766619828dafc2d660246adf8ef. 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/GBAYC2301405.
Piano Concerto in G Major, M. 83: I. Allegramente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4c6d5a83e36655c0f1993af649b2ebb58ad88b43e5a5bde44f6d3365af8839. 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/DEN961500861.
Piano Concerto in G Major, M. 83: II. Adagio assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63cfa3ad68b393486fb98a1f2c9d6def4f24ac2257493282ff2e1d18b4718ed. 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/DEN961500862.
Piano Concerto in G Major, M. 83: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41b24f72e5eebee405e82ba31fd1ec72cd0d059fee8dbba70b17df6c83c8edb. 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/DEN961500863.
Piano Concerto for the Left Hand, M. 82: I. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7531a6c1e3cb68c15a68036680e8e4973ed9f5ddc821d10c7b27b4277cd8210f. 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/DEN961500881.
Piano Concerto for the Left Hand, M. 82: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbc423e9024b34e44efe592500a296a14935e531ac35bf09166bf069a34b929. 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/DEN961500882.
Piano Concerto for the Left Hand, M. 82: III. Tempo I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b472747ecb185343341c85258f2034ebf0c818aa49372c5e27d2492ea565c3. 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/DEN961500883.
Piano Concerto No. 2 in F Minor, Op. 21: 2. Larghetto
Chopin: Piano Concerto No.2; Ballade No.4; Berceuse; Polonaise Héroïque
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47672a6a122fb3decd36b607f683267670a541b0893c31d230da00507cedc029. 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/GBF071304282.
Chopin: Piano Concerto No. 2 in F Minor, Op. 21: Piano Concerto No.2 in F Minor, Op.2; 2. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47672a6a122fb3decd36b607f683267670a541b0893c31d230da00507cedc029. 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/GBF071304282.
Piano Concerto No. 2 in F Minor, Op. 21: 1. Maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340bf6ce601b0077b2121123ec78921219c45acd899e09aa0b671555446c58f2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071304281.
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 No. 2 in F Minor, Op. 21: 3. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927ad10083d011dacee8420ed95f0270b624fc7d53f0273827915faa8a4bac75. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071304283.