Geoffrey Lancaster (born 20 August 1954) is an Australian classical pianist and conductor. Born in Sydney, he was raised in Dubbo, New South Wales before moving to Canberra. He attended the Canberra
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 0x995f1eb2fc87a7e60b3e54d9b3ae9518d6a51526816590629e07f9aa9bbe59f5. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/935429a8-ce41-4dea-b1f7-ed6363ed2fbb.json and https://artists.proofprofile.net/proofs/artist/935429a8-ce41-4dea-b1f7-ed6363ed2fbb.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Serenade No. 13 in G Major, K. 525 "Eine Kleine Nachtmusik": III. Romance
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 0xd1dd81e41bec4c65c48fdfbae40f589d8bb8c7f532d4999665d159554e72d5f7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB09250084 — a six-check JSON result.
The Four Seasons: Violin Concerto in G Minor, RV315 ‘Summer’: III. Presto
Van Gogh Alive - The Experience: A Musical Memento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261e679da0c5d1ace8a0ca69aeee1466c609879d4e5a570f80111b94985d7b7c. 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/AUAB08950021 — a six-check JSON result.
Mass in C Major, Hob. XXII:9 "Paukenmesse": I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d6fa7b84e98c13ee3b098000cf2679f0729ee9e4b4503efa13457a96b76d44. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USSM19504359 — a six-check JSON result.
Mass in C Major, Hob. XXII:9 "Paukenmesse": II. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34c44c77e0cc39971b87f8820181044ea3a6b68e718cbf96fccb6f491342575. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USSM19504360 — a six-check JSON result.
Mass in C Major, Hob. XXII:9 "Paukenmesse": III. Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdef8a85533a21f20bff1d701b6a7cbcd841bb9ab1b8a0b1e9f55780d119393a. 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/USSM19504361 — a six-check JSON result.
Mass in C Major, Hob. XXII:9 "Paukenmesse": IV. Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588411b1c5d936a8598044c6f93eaec86dd2dd5d067d456c79a995434827c8f1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19504362 — a six-check JSON result.
Mass in C Major, Hob. XXII:9 "Paukenmesse": V. Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f2e791ab8e23fc9c83a25ce698e6d24bd5e28e3bdbe8f7869b485d6a537ecf. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USSM19504363 — a six-check JSON result.
Mass in C Major, Hob. XXII:9 "Paukenmesse": VI. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdd708401e43bbe02461be05fc39d03f0bbcc07ebeae48fbfffecd9ebff5ebc. 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/USSM19503913 — a six-check JSON result.
Salve Regina, Hob. XXIIIb:2: Salve Regina (Adagio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb549c67c6495688ad5293733b36e00f4567c9ecea5c53949de00d6b1e8a9f6. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USSM10902098 — a six-check JSON result.
Salve Regina, Hob. XXIIIb:2: Eia ergo (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd55eeb7ecbf3fb1b4f8980ef4dafbdb59e807f14b1f6ef765f66103403559e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10902099 — a six-check JSON result.
Salve Regina, Hob. XXIIIb:2: Et Jesum (Largo) - O clemens (Allegretto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632df86a88fc3fac5d88e261c1b13808356ee7b307a7fe817f3bf6457f2fd9c0. 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/USSM10902100 — a six-check JSON result.