Benjamin Grosvenor (born 8 July 1992) is a British classical pianist. Education Grosvenor was born and brought up in Westcliff-on-Sea, Southend-on-Sea, Essex. He is the youngest of five brothers. H
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 0x7177086f7490c0d3aed946924c288f15450d485b472c310d79eda6f5f294ad3b. 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/e9722319-5869-4efe-8b06-66857772abd6.json and https://artists.proofprofile.net/proofs/artist/e9722319-5869-4efe-8b06-66857772abd6.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Benjamin Grosvenor: Chopin, Liszt, Ravel
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 0x893bb3337b92708f9735bf831c4e588c70564e21f66fbe6984975c0379d70990. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/GBBBA1100440 — a six-check JSON result.
Gaspard de la nuit, M. 55: No. 1, Ondine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4711e9fa84cd8e733a79114daea580346640e45fa75d4f4adadcb042f22a0d8. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/GBBBA1100501 — a six-check JSON result.
Rhapsody In Blue: Saint-Säens, Ravel, Gershwin
Piano Concerto in G Major, M. 83: II. Adagio assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc5565f3cb660c101353f087c57850c17fd16a7d16dfbadd16e259a991db8b4. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/GBF071201882 — a six-check JSON result.
Partita No. 4 in D Major, BWV 828: I. Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2880b95cebcb84d366675138c2fe79bc540723c8ad9a5ed9879ce2e4f6c098b8. 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/GBF071400371 — a six-check JSON result.
Partita No. 4 in D Major, BWV 828: II. Allemande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b34a45a338ef71622bc861b4cef1eba5bf3ff5def05fcf2ac04fb1a719e92c. 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/GBF071400372 — a six-check JSON result.
Partita No. 4 in D Major, BWV 828: V. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8829835a1aee24d3a8be05076ae03c8510a9f669a50b7034b398f949da98fcf8. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBF071400375 — a six-check JSON result.
Andante spianato et Grande polonaise brillante, Op. 22: I. Andante spianato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f8068ed5b33c04e35447e88dca9fdd4970a8a897deaf729af348d1404677ea. 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/GBF071400391 — a six-check JSON result.
Andante spianato et Grande polonaise brillante, Op. 22: II. Grande Polonaise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe118749b480a7a198d02f0bed4f4cce41f375be992c6d5bfea723d3c56fd52c4. 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/GBF071400392 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0f9c3a2f7376e91afc610bd34ba20e141ee329c20f75dc0a3d66433c1fa516. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071400440 — a six-check JSON result.
8 Valses poéticos: Preludio. Vivace molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b7a95d44766057b28dcc6f0aea00cbe860270dfd41452dd8a8c5cc93f0c679. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071400451 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c891b731da468feb3fe61313b1c57d0f856b48db018b5ff69dcda83d46040c. 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/GBF071400452 — a six-check JSON result.
Arabesques on "An die schönen Blauen Donau" (After J. Strauss II)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd5a7cb56afc550bf00003decac2ea7288223b210ba8645f43841b9890349b0. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBF071400470 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4167313966ce6d639cbe6b2769504de4300c994a1d2e9c377e3807376456ff6. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071400520 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1421a412233a7b6fe95215f76d18788c218fb64e8b21c3c0aa9860fc2c18337f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GBBBC2201458 — a six-check JSON result.
Variations on a Theme by Robert Schumann, Op. 20: Theme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ce85c897c8d00a3a7f981353f58b5cfb995ac7ea82fec08bc217b1e234d733. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2201476 — a six-check JSON result.
The Echoes of Women - International Women's Day 2024
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ce85c897c8d00a3a7f981353f58b5cfb995ac7ea82fec08bc217b1e234d733. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2201476 — a six-check JSON result.
Nocturne No. 19 in E Minor, Op. 72, No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ff32a53828675f3446f843359bf842d58baf5ca01fdba1bb78a3f0ba72ddbd. 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/GBBBA1100450 — a six-check JSON result.
Variations on a Theme by Robert Schumann, Op. 20: Var. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d66f5476327344ea6f19077f0f71622f8f00e7abf4465b94ec1ac5efb85b4e. 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/GBBBC2201479 — a six-check JSON result.
Variations on a Theme by Robert Schumann, Op. 20: Var. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163733fa929e7d768f64bdb7407f69c5b0113b09e3904f2cd61f9099154cf52b. 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/GBBBC2201477 — a six-check JSON result.
Variations on a Theme by Robert Schumann, Op. 20: Var. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05064a0205cf4be007521042d798711aba00fc9f5aaf0bcf165af8622dad52d4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2201480 — a six-check JSON result.
Variations on a Theme by Robert Schumann, Op. 20: Var. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12191e32e7a11cc3acbcfcefc1d10aff8bd0435b444c56cd1949c14b8f57ae5. 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/GBBBC2201482 — a six-check JSON result.
Variations on a Theme by Robert Schumann, Op. 20: Var. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edb93d2f5398bf339eb86e4b929d3540fef5b2b3f85b2c233042941ddf0a9a3. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2201478 — a six-check JSON result.
Variations on a Theme by Robert Schumann, Op. 20: Var. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cd7febb683199f12a7307aeff3b5d5ceee0cecbcb4bac105fe475ff892caa3. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBBBC2201481 — a six-check JSON result.
Variations on a Theme by Robert Schumann, Op. 20: Var. 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427b9f530e633923463fcce4244694a9bf6e9a221659ca62b28e23e441794612. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GBBBC2201483 — a six-check JSON result.
Piano Concerto No. 1 in E Minor, Op. 11: I. Allegro maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d55875eeba764b81200f00e9d4f2dbf3eae9e3fc4ad712d3caaae18a381867. 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/GBBBC1900124 — a six-check JSON result.
Piano Concerto No. 1 in E Minor, Op. 11: II. Romance. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb029e89ffb5da8d00334eb608d13a6e6520b203f660dea330352a1583e168421. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC1900125 — a six-check JSON result.
Piano Concerto No. 1 in E Minor, Op. 11: III. Rondo. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff9d5f217193b9791ef13a1cc4ee688c00ff17360e28230d1af2eaa8586e819. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBBBC1900126 — a six-check JSON result.