David Sinclair may refer to: David Sinclair (footballer, born 1969), Scottish football player (Raith Rovers) David Sinclair (footballer, born 1990), Scottish football player David Sinclair (Numbers
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 0x6dd72e5526b3490bac05e88ef636111eeb384bac5500582d53b17caa0440aee3. 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/078548eb-3487-4f29-aa0d-ae1fbda4c365.json and https://artists.proofprofile.net/proofs/artist/078548eb-3487-4f29-aa0d-ae1fbda4c365.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Double Bass Recital: Sinclair, David - Hoffmeister, F.A. / Pichl, W. / Vanhal, J.B. (Forgotten Treasures, Vol. 3)
Wiener Stimmung: Works for the Viennese Bass from the Late 18th Century
Concerto No.4, en mi mineur, Op. 17: Allegro
Aubert : Concertos à quatre violons, Op. 17 & Op. 26
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 0xbd75d6b7d0f9872e401452f9c30f2cd2dc19a95329a74113090c53aae3a09740. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FRZ170300510.
Concerto No.4, en mi mineur, Op. 17: Aria, gracioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0114ad986732508ab2b937e3dbed014f296dd8c44a27bc598aca797cf96268. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FRZ170300520.
Concerto No.4 en mi mineur, Op. 17: Allegro 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c13d1b0d34f3e9918e1bdd265dfb0ea37e0324f6d79cc81e3d895ffc1242bfb. 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/FRZ170300530.
Concerto No.4, en mi mineur, Op. 26: Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf917898c5bf97b7f5e566d1220187d2081aab505006a8f4fb068d0e2b2e03798. 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/FRZ170300540.
Concerto No.4, en mi mineur, Op. 26: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc16fe7e1cf6cfc2e9243de36ba25792f463c0e53000a99531b907e47f43a097. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FRZ170300550.
Concerto No.4, en mi mineur, Op. 26: Aria, largo e gracioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a26696019bff48fbeef75a03e7d1b5b3e941b928963c4c99044dd65db8a7b3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ170300560.
Concerto No.4, en mi mineur, Op. 26: Carillon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0635868703f6f85f085e49aa9a2699833eeeeb7860613795c751145c9fa7c36f. 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/FRZ170300570.
Concerto No.1, en ré majeur, Op. 17: Minuetto, allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc854649ec4996f8fa89abc0a29f21f0d967052bf32293e73be18b0d322d1ad25. 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/FRZ170300600.
Concerto No.6, en sol mineur, Op. 17: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2412fdcfecfc4061cadfcfecd043f051b7a300843075306796a46a0e2224cb0e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ170300660.
Concerto No.1, en ré majeur, Op. 17: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cebf2da835b66636abe1dc99f436e62c3479b03e9f4e7922efb5fdfe5adf346. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FRZ170300580.
Concerto No.1, en ré majeur, Op. 17: Gavotte, gracioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe019fea39bafe2a58fa4a84f58177c172030becf93126fd2af438c073a3e28d1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ170300590.
Concerto No.3, en ré majeur, Op. 26: Ciaconna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72410bd24e459a9af16acaaaab6ea2be99e3ed5d5a7aeec823c9f804fb3df1b3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRZ170300610.
Concerto No.2, en fa majeur, Op. 26: Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2262d0b1d15c11862176d16cf80c09485f0eead08d58682733054faa2578231e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRZ170300620.
Concerto No.2 en fa majeur, Op. 26: Gavotte, gracioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0fb2dbd37ba54c96d225a83a665d4b93a14e5179a2cf52b1ab7be2212ca5a1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ170300640.
Concerto No.2, en fa majeur, Op. 26: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04be0d5eedd29024c0df3115c0147f601004f2d2a1f4ff62c306f56090bb6319. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FRZ170300650.
Concerto No.6, en sol mineur, Op. 17: Aria, gracioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c681290b7f1ca7a374a526a53e8e39c1b84c80af457650348434ec842695812. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ170300670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a02320e6db9a1a5cccc8f671f64c3274ca7e53f59baafd2b8b785838900d3a. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/FRZ170300680.
Concerto No.5, en fa majeur, Op. 17: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f833603cacf111cf3d2fe6442337d54c5347362df21b656e9cc0dae2a96d28a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ170300690.
Concerto No.5, en fa majeur, Op. 17: Gavotte, gracioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02a206c6dc3806d2d0da33bfc5622946876e83ffc56ccb1a1950fabb0efe2f5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FRZ170300700.