David Watkins may refer to: David Watkins (Australian politician) (1865–1935), Member of the Australian House of Representatives 1901–1935 David Oliver Watkins (1896–1971), Member of the Australian 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb11f85c29807a41ddbe9b44bc4400dc3a9c4802ceaf138501da0893e087e45. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0649432-2c79-4c9d-986a-083811bb0635.json and https://artists.proofprofile.net/proofs/artist/f0649432-2c79-4c9d-986a-083811bb0635.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Harp Recital: Mcdonald, Susann - Salzedo, C. / Albeniz, M. / Albeniz, I. / Watkins, D. / Ortiz, A. / Francisque, A. (The World of the Harp)
Chanson dans la nuit (Song in the Night)
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 0xf70f17be1f060a2380bd8630a0317724614b33e3f01c77e2ec0c710700a88d79. 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/USASX0800501.
Keyboard Sonata in D Major (arr. for harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f27ab818f4f5a3da56e463a7db6c2e3fa6546d01e6a0b49c46a09948ce7ffb2. 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/USASX0800502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be8c5a683b9c521030b89ad2283d2e3c2a9fcefe508f1f7508653e0a64568c5. 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/USASX0800504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bebdd39907aa26f5517813dc7eb08aa8bf658c303fedc5a50e903df9966baa8. 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/USASX0800505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f704bc5a65e2fb84e80888f888f1d217598f9665584bced9186dff8b6b9c17d. 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/USASX0800506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8459ff7fadede845f3d8099e7c562c7dd1f9068124ac78c1a3f2778d25c6f4aa. 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/USASX0800508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ecf908839484af427b1d064c4c1900c2269746a3afc1bbeaca88b5b30084f8. 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/USASX0800510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a82acf5618b9984e6435c303f11174381b9e551ea069213025d098c696787f7. 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/USASX0800511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df49077be1542d7dff57c83f88aa81a0b821e2376eab475fe9b424bdc3504f2. 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/USASX0800514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414925793f056da2134020928b337d92b16049a67a59c2826eb41c53dd5c51f2. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USASX0800516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa366623f9a1895299eb99bfc90bacff1fb77994c6b2aa861d0fa2babb8261fc1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB00650624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee3b5d6e67b1fcb7a6b8c3c2df68d79eed1522c40771243daa6c04ecf656a3f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB01750379.
King Arthur, Z. 628, Act 5: "Fairest Isle" (Arr. Marshall McGuire)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f6752ca4a1252241d31ca8082851d10bdad69e0ce469e941653af5c7596d27. 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/AUAB09850163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff2b3a5e4065d921ed02c46e5d91c9982b23eaa07e4df31db008a1ea2e79db2. 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/AUAB09850175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde0efe5b1c0e2da1bdebf409dba7901134241d88c0c022e85800d558ea4e635. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/AUAB09850179.
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 0xbc1334369278876e8e5d5693a58fbd55d1bd5bb46bfd9d6969733effa6495c6b. 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/USAB11663701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490701195c0ec69a1029a0889162f6cc034846388b64ca28f3f953c6258f86fe. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USAB11663703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4803a7c0361a94d60c9ae04e2c8db2eb71ba0c4c730c4b647914bccbd03fd18c. 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/USAB11663705.
Steubenville Rape Case: A Musical of Madness
Improvisations & Sonatas: Piano Music of David Burge
Portrait - Stravinsky, Helps, Berg, Martin
King Arthur: Fairest Isle - Arr. Marshall McGuire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f6752ca4a1252241d31ca8082851d10bdad69e0ce469e941653af5c7596d27. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB09850163.
The Well-Tempered Clavier: Prelude in C Major BWV 846
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a3a893fe63f92b730a801e6799c592d3553e859fc1528d509185690778027b. 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/AUAB09850165.
3rd Booke of Ayres: Oft I have sighed for him
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98e8c4a5de1f1952aeef99a2fdb39fc28de645fe7a6817688e8a37b654fc53c. 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/AUAB09850166.
Lachrymae Antiquae Pavane - Ed. David Watkins
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc888a76418dc8d5f22bf69bbe3a12c61d66387948a7e026073511c4639a2d04. 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/AUAB09850167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30773b3fcb16ba3b267d68b13a041a909ece3893d56d6904efec8bfdcf18500. 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/AUAB09850173.
Amarilli mia bella - Arr. Marshall McGuire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff2b3a5e4065d921ed02c46e5d91c9982b23eaa07e4df31db008a1ea2e79db2. 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/AUAB09850175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c15e632b12f2a4a6c7507e614325abe68673db50f350f8eba3fbee52a4e8d9. 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/AUAB09850180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb59c1541d40c9b05c568055962f9014c2c5beb763165828ecfdd71e60ca476d. 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/AUAB09850183.
Abdelazar: Round O ZT684 - Ed. David Watkins
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c90fd51c593375f27511c39d2520e3f32576abd2088556d61042196a4f99bd. 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/AUAB09850168.
Falla: Popular Spanish Suite / Piano Pieces / Harpsichord Concerto
7 Canciones populares espanolas (arr. P. Kochanski for violin and piano): El Pano moruno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584c564a794a7a535e21b3d77b07d1d26bfec0db28a57ee1b583470d44565575. 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/HKI199752401.
7 Canciones populares espanolas (arr. P. Kochanski for violin and piano): Asturiana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5099ce0e75cd7c0b30e14e3b7c156cbeb7b99dc10107588c52291d121851bc7. 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/HKI199752405.
7 Canciones populares espanolas (arr. P. Kochanski for violin and piano): Jota
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eeee5a2fec15ddfa55538603241afa5321325f349d54ee865bd678297a99ca7. 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/HKI199752406.
Fairest Isle: The Timeless Music of Purcell
Dido and Aeneas, Z. 626: "Thy Hand, Belinda... When I Am Laid in Earth"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e2cdde877cdb24bbbe8d54848759e082c3d028f65ec30713de0276671c5963. 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/AUAB00650116.
Chertok, Watkins, Maros, Britten, Mathias: Nocturne (Harp Suites from 1948 to 1988)
Britten: Works for Guitar and Works for Harp