David Sanger is the name of: David Sanger (organist) (1947–2010), British concert organist David Sanger (drummer), member of the American country music group Asleep at the Wheel David E. Sanger (bo
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 0x89c3d0b1e5f16ee6a63549d123c730623fb96ec92a83a4c979a612e6f16b8996. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf4a62c0-cb3e-49cf-a6b6-7dc5925ce9ed.json and https://artists.proofprofile.net/proofs/artist/cf4a62c0-cb3e-49cf-a6b6-7dc5925ce9ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony No. 3, 24 Pieces en style libre (1914)
Widor: Organ Symphony No. 5, French Organ Encores
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 0xa0acb80d1455077e3176984160078f27d623a114683de16a453745dc00897d15. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USX761629205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d0a80b6f47518f1b0d819f497b8be1c30765737f1152a62c4d1a78f59f1f0f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USX761629206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c2cac9c06e99fb74c901603fb24416e7b9240fa7455dbaaa8f96350fa33687. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/USX761629207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb45a1859300a158f259f053b17a827127715444503986caa5ee5112efa659b. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USX761629210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedcd7e0e6511d901be140463d95785639e940929e930168d5615789fafe55be. 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/NOMVA1159010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62eea2916049f4e431acb8fe2f0cf2741a0d30a9e42384fffb3ead141b4695b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NOMVA1159020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac4df319c16a313bb77ce813c65f94a88758539a7f153f2a43fdd404cdbea8c. 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/NOMVA1159300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cda13afc29e691720501678fcb869216a3d8079d6efffdeadd0f77a1dd0363e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NOMVA1159030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d4c0bbd264e0307d087ce5495f449fd7fe348c0ea5d817396dc213abb4d4e1. 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/NOMVA1159040.
Der Tag, der ist so freudenreich oder Ein Kindelein so löbelich BWV 719
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b5f5097c11b3e199ce5d8524f8d83daee6f70b6d0ef953abf0f5414556763f. 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/NOMVA1159050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba519e7c863f41fe614683604a122d5bd9a493731f562e27658468412c28b669. 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/NOMVA1159060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5d59cea2350ee0c2e823ba7e2b529f6932e8f88d2f51ceec8da606cd2dfe36. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/NOMVA1159070.
Herr Gott, nun schleuß den Himmel auf BWV 1092
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50c290e74533fc0c19f8ab9d45ce2a3728574b7d1e7fee8a2f93821dabe6e63. 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/NOMVA1159080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741915830ac4c450651d0a61b9bb48461ae644888ebac3a2d9309d54fe703fe4. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/NOMVA1159090.
Christe, der du bist Tag und Licht oder Wir danken dir, Herr Jesu Christ BWV 1096
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104d05b33c9317fb0399f4e48f7b6e22965ba0b853179e8649396f5624a37c4e. 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/NOMVA1159100.
Präludium und fuge in A BWV 536 – I Präludium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f609ac648070c8dcc5ad9cc7624f92c1bb7e11fe630b8ae979a7147f53f7b9. 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/NOMVA1159110.
Präludium und fuge in A BWV 536 – II Fuge
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdd14bb7504f9da53436539996116130b34960d69cd6d2fdfcf28f8b64e2edf. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/NOMVA1159120.
Partite diverse super Christ, der du bist der helle Tag BWV 766 – Partita V
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549480814d560897bd3ea8486c40b9c6f1085e43b132a4ca2b50f43ddee6663a. 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/NOMVA1159170.
Partite diverse super Christ, der du bist der helle Tag BWV 766 – Partita VII
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7943d537d90418782854ebfe00c3e5b2ac25b207bf57c1de170c03d3f17eae. 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/NOMVA1159190.
Choralfantasie über Wo Gott der Herr nicht bei uns hält BWV 1128
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd518abc4bbbb7c990cd9f2de2a7b158363c0b0326a6b078181a6e2a6de29a5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NOMVA1159210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe905aae961f234044055d0d70e27646b009f16b37d0f684f3f247e12ad68b5e8. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NOMVA1159230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdc0e2be5930b018ef6865886fbd72eaadafa373bf690e6e168f969faac76d9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOMVA1159270.
Organ Concerto in A Minor, BWV 593: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c69313c171db88401e2c7502eadaefc810a1b61d8fed2b0a2f86cdcab005f9. 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/GBABV1010740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfefc483604bcaa70c5af789d35030cc4b90d4354fb87ad0f2fe1746d9a84987. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBABV0958023.
6 Organ Pieces, Op. 38: No. 1, Marche in C Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2f8d4c3b1d7615cc83b4996f4636658e56b33e0cfa4c5834b5daa9745e86c1. 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/GBABV0958027.
The Organ Music of J.S. Bach, Vol. 5 "Das Orgel-Büchlein"
Bach: Third Part of the Clavier Übung, Vol. 8
Bach: Third Part of the Clavier Übung, Vol. 7
Symphony No. 1 In D Minor, Op. 14: VI. Final
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e0da81e565f711de4b0a345f683ab7d2947e5e7c532a95ed33f0cc869f9f64. 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/GBABV0710318.
Symphony No. 6 in B Minor, Op. 59: V. Final
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125a332a3364a71083f815d38b25b3796302935daaa11d5acdbdae9c392a5d23. 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/GBABV0710333.
Bach, J.C. / Wesley / Hesse / Merkel: Duets for Organ
Magnificat - The Life of the Blessed Virgin Mary in Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eaa481544aaa884ecfa44a30f607a07dda1bc9538aafcb9b37a57f1330d3f0. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/CH6639975812.
"In the Pleasant Groves" Music by Handel