Jack Gibbons (born 2 March 1962) is an English-born American classical composer and virtuoso pianist. Biography Gibbons was born in England. His father was a scientist and his mother a visual arti
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 0xef8ab6cf9d9c58257d81ef8efd425ce1836cb4b150e9689f82799b0c9585dc8c. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79368870-4d8c-42ce-a4c4-638f27af78e5.json and https://artists.proofprofile.net/proofs/artist/79368870-4d8c-42ce-a4c4-638f27af78e5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Douze Etudes dans les Tons Mineurs, Op. 39: 1. Comme le vent
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 0xa9cee5a3ba825fbe6003dff4789532b04a56b12cb598dc2fcb0ac7ccec9b96b0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM70803353.
Douze Etudes dans les Tons Mineurs, Op. 39: 8. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc7da4018b5e02cf2fc3cf837ce9066674347deeac4a8cdcadf7719b48a010b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM70803372.
Douze Etudes dans les Tons Mineurs, Op. 39: 2. En rythme molossique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6bec2338534d2b74786db091bc53b84d992fd19a93c87173843bf7a367d347. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM70803354.
Douze Etudes dans les Tons Mineurs, Op. 39: 9. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b2f2a0b3172b8eea10787bb0315946ab3d7db8ed826e767833e995d2cb4551. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBUM70803373.
Douze Etudes dans les Tons Mineurs, Op. 39: 3. Scherzo diabolico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1320ea7ed0642b6393a227cdcfba2b34a7de9e7d4fdbbba3141f5066f423b30. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBUM70803355.
Douze Etudes dans les Tons Mineurs, Op. 39: 10. Allegro alla barbaresca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b7c4c345f53c87aab0c177c57568cebd72419bd890f53f1ef6f38e11004d60. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GBUM70803374.
Douze Etudes dans les Tons Mineurs, Op. 39: 4. Symphonie - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe050995d04e3d785128aad3224a9c69dcc13a465b4797f20dfce9266eaef9c70. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/GBUM70803356.
Douze Etudes dans les Tons Mineurs, Op. 39: 11. Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2715af9ed7e47e8d2a69d9cce0000dc84cf61b809faff8de894511accbeccf. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBUM70803375.
Douze Etudes dans les Tons Mineurs, Op. 39: 5. Symphonie - Marche funebre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666aa3f7c00e7040c26a56acd5d616790951cb6acfdc7a942d049ef2c2af3de7. 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/GBUM70803357.
Douze Etudes dans les Tons Mineurs, Op. 39: 12. Le Festin d'Esope
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254a867f75743dcddb794981a381937622552a3db76570f463980587a482a45c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM70803376.
Douze Etudes dans les Tons Mineurs, Op. 39: 6. Symphonie - Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b669510573d8456b570bb7dd6a261a815db7ac88e23ec4f54fb4f499df593ce. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBUM70803358.
Douze Etudes dans les Tons Mineurs, Op. 39: 7. Symphonie - Finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b5647888bc44ad075fae9bbe782e6cdac29ff40486f6319a049c2f57de3234. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM70803359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb274d1f1238fe1ff00cdcc9d61016857c388c561fecf1ea57b59c4a51047d097. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM70803361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497a7f18a5e1fc9393fa0640ad1bdf8391b9b119480150fd4c0af4282cfdbd6e. 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/GBUM70803362.
25 Preludes, Op. 31: 13. J'etais endormie, mais mon coeur veillait
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8cfc2a84a08b6646a35b51dc0d2a5faaed88e7385648b6972bac4094aee2c7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM70803363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54e4d311809d616760bec4aee2a009b908ec539c9040a866180d6cba1b08666. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBUM70803364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49c2273888d998ff8be1251c005f288a804c33c09176928d7423e479b5bc6be. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBUM70803365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e6eff9cd5b9ff78bd728de03fd755df9708f4b90e940ca13d42c540afac546. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM70803366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725b25f9b7678a72cc3bc5715362c2b9c6bcc02fe2c895775f38409038d17355. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBUM70803368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce5eb9771d5fd8e689e2f5662aec5706c03678c8e606d7fb6b184a9c61a888e. 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/GBUM70803369.
25 Preludes, Op. 31 / 1st Suite: 8. La chansonne de la folle au bord de la mer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2955a7a30f887cdfa1e67b9341d5f042eeff8b900712f6330e0437c682cccd65. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBUM70803370.
25 Preludes, Op. 31 / 2nd Suite: 12. Le temps qui n'est plus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a60cf4162430171318dfcd745bd611b1aaa6fd8cb628e6c2b3f4560bb870112. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBUM70803371.