Willi Gundlach (15 May 1929 – 6 November 2025) was a German choral conductor and musicologist. He taught music pedagogy at the music department of the Technical University of Dortmund. He researched a
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 0xdd9a85fcb355d579faa0ecdd6e3f77f198b22c1230796fc1df754cda01cda874. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59fc809e-6f68-4a31-8a94-dc3467b4ffcc.json and https://artists.proofprofile.net/proofs/artist/59fc809e-6f68-4a31-8a94-dc3467b4ffcc.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x4441cd1566741d9b451b45510510cbbf6d2e7ccacb6ea3d421ca3e19edddfa6f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299421505 — a six-check JSON result.
Totentanz, op. 12,2: XVII. 9. Chorspruch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5598f7d2c98d951aa8fb49455c4d37a31f4c35fbc340600056ecce39fdb08d3b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299421517 — a six-check JSON result.
Choralpassion für 5-stimmigen gemischten Chor, op. 7: I. Choral 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c87a4817270e9f8aac91d1f70f84695fb8d4cbafe12ad2639ba96db5881f07. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299318501 — a six-check JSON result.
Choralpassion für 5-stimmigen gemischten Chor, op. 7: II. Der Passion 1. Teil - Der Einzug
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50658a4299cc48c28c78a47b24eda4c06eefb06e5828eb7a91717c0ce98cdf19. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299318502 — a six-check JSON result.
Choralpassion für 5-stimmigen gemischten Chor, op. 7: III. Choral 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1828fae31308f0088b1563e7f09708764cc1daed98b3da9d5b63f86efea73795. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299318503 — a six-check JSON result.
Choralpassion für 5-stimmigen gemischten Chor, op. 7: IV. Der Passion 2. Teil - Judas und der Pharisäer Rat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0f7f75e31fed001fcebe9da7201720aa3f073f1fe823e044261101b3cfbcfc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299318504 — a six-check JSON result.
Choralpassion für 5-stimmigen gemischten Chor, op. 7: V. Choral 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4101db8280862039e04ffe61d712b9055d216bfd724a9c34a8b76cb6a0682427. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299318505 — a six-check JSON result.
Choralpassion für 5-stimmigen gemischten Chor, op. 7: VI. Der Passion 3. Teil - Das Abendmahl
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f65811431821f57cb7306d43db58036eb60b9a038e531285afcd35ae6750a68. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299318506 — a six-check JSON result.
Choralpassion für 5-stimmigen gemischten Chor, op. 7: VII. Choral 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42120ed06c7402efcd87badd4cefc53170a35ea2ad78d6e58bc2b1a9d83e5b33. 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/DEC299318507 — a six-check JSON result.
Choralpassion für 5-stimmigen gemischten Chor, op. 7: IX. Choral 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306683b74e9aa7afd74f95a98ed9a2510e83de9254b1fa237d7938fc01dd2b39. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299318509 — a six-check JSON result.
Choralpassion für 5-stimmigen gemischten Chor, op. 7: X. Der Passion 5. Teil - Kaiphas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026be74f32ca2497fe25fb3a51edc019f090c5a3c3d763ad7e2ea821b85ddaa2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299318510 — a six-check JSON result.
Choralpassion für 5-stimmigen gemischten Chor, op. 7: XI. Choral 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d010a038c20f19d1aafc945a51c0465b6521a4d11fdba00a9008803b37cf1b. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299318511 — a six-check JSON result.
Choralpassion für 5-stimmigen gemischten Chor, op. 7: XII. Der Passion 6. Teil - Pilatus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e4352e2ba265be700791844b9da4f5cef1403df3279e4f6dc8891449a558ea. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299318512 — a six-check JSON result.
Choralpassion für 5-stimmigen gemischten Chor, op. 7: XIII. Choral 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42162e378ff8704f7d94c01696d66bbad9e5d32bfff43fc2fe95fcf3fc13bcf1. 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/DEC299318513 — a six-check JSON result.
Choralpassion für 5-stimmigen gemischten Chor, op. 7: XIV. Der Passion letzter Teil - Golgatha
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe2e33dab56abc30bf244a547aa04fae7593630ff09b2ca6959edf5601c6ea7. 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/DEC299318514 — a six-check JSON result.
Hiob, Kantate für Chor und Orchester: I. Chor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f01135197634c4a0122170fd174a01abf46bb095e47b6359311d1f12543455a. 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/DEC299734601 — a six-check JSON result.
Hiob, Kantate für Chor und Orchester: II. Arioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b73ad2110eabdd6c39ae2f986962ae7a011c0362487f58007f05b86d41a6da. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEC299734602 — a six-check JSON result.
Hiob, Kantate für Chor und Orchester: III. Chor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718c0363f4bf7c14fa339d24008a1a0cc44a11775451e561d62196ea8a9e3b1b. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299734603 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc64e3cfcd1b88af1847e31ab9f8fbc3ceca18fa367deb568f259366c8ce1de6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299734604 — a six-check JSON result.
Psalm 115 für Soli, Chor und Orchester: I. Chor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3178ae3b2ab5404b02489bc932b4a6170b796d6bfae92a7873df49b436086c20. 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/DEC299734605 — a six-check JSON result.
Psalm 115 für Soli, Chor und Orchester: II. Duett mit Chor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60082ea9e80972dc7f0436251cc6003a78638094feb573319e7b88b67e25795d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299734606 — a six-check JSON result.
Psalm 115 für Soli, Chor und Orchester: IV. Chor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e705deaea2ff18b995cb2a8a29f73bb232ca784a483d4a367f23a52371c72e2. 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/DEC299734608 — a six-check JSON result.
Lobgesang, Kantate für Soli, Chor und Orchester: I. Intoduzione Pastorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa000bb78169824ac82dd8609304e574681f09ee985ec2e7212f761aeceed5de6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299734610 — a six-check JSON result.
Lobgesang, Kantate für Soli, Chor und Orchester: II. Chor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4348aa8cf5480af973b1878cba41c0319025b3078ef85f3449a2b8a28331a8af. 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/DEC299734611 — a six-check JSON result.
Lobgesang, Kantate für Soli, Chor und Orchester: III. Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc12a24c226a54b7ba37185e45337a10335ac882e4f923db1949561692046fa. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299734612 — a six-check JSON result.
Lobgesang, Kantate für Soli, Chor und Orchester: IV. Aria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0ea0fb50889763a150cdf93da7c5d3fe59cc7c36d65f32c44dfac74b90f8ed. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299734613 — a six-check JSON result.
Lobgesang, Kantate für Soli, Chor und Orchester: V. Schlusschor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ec8810bca946542390196d8dc3592219a05d5e4864c5546221f61d1052e5c9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEC299734614 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73de0c2b041ff654a8f073116207ff64bc162c0c19413dad812ef95777280423. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299839812 — a six-check JSON result.
Fanny Hensel-Mendelssohn: Chorlieder, Duette, Terzette
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0621b6af6d3407a1abb99d9116a8d3d1d68462a5cbd4f04f1b4361439d7dfd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299529902 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18ef81f3cb99b69bbff468c5a194219358f693bcd9a08749bd295ccfd138251. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299529903 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64343d49130057e0e33ed633fb89d9694f612c9d475ee9b06f18f4df48febd7b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEC299529907 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8222386514b1440d64f9367e4e88c4eb7bff1307b694fa54b778af5d30a859. 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/DEC299529908 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9b0e6f2e321ecf8550f3d7c59c20237370ef025a7bf7378896ca6968eda7b0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC299529909 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918a38729cbb4787ef35d545229d20ed0dd9d7c6ff390e198467bd1dec8d830e. 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/DEC299529913 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c475f118a89afbce41154079af8601fd51b8b1486f22b9888138ea421281e0a. 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/DEC299529915 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7016673ab3f24689cfb6457626c889e17c93b8c0a375e09c4376add98e0ed863. 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/DEC299529917 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dafdcab38b014b04e5cf4cc89a3060fa97153a38d430145162ede115302fee. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEC299529921 — a six-check JSON result.