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 0xee5ee230f9e8223998cce88b449087dfd3795915537d39c6dc48247c88dba566. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea9a0e8a-8ec9-4ccf-8aa8-fe6c767e2f9f.json and https://artists.proofprofile.net/proofs/artist/ea9a0e8a-8ec9-4ccf-8aa8-fe6c767e2f9f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Zelenka: Missa Sancti Josephi; De Profundis; In Exitu Israel
Missa Sancti Josephi, ZWV 14: No. 1 Kyrie - Christe - Kyrie
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 0xe14a845b81b2dba7f134f6ba83f0ff000b8eb54e72d7e9155cd7624340b4d1a4. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEB111804101 — a six-check JSON result.
Missa Sancti Josephi, ZWV 14: No. 2 Gloria in excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c59b3af72d16eab8b100f6b4a0c2352725c170294133785b7724aaf239e2ac9. 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/DEB111804102 — a six-check JSON result.
Missa Sancti Josephi, ZWV 14: No. 3 Et in terra pax
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa50a97ed606444a3ce70c003d83ec6eb154972694f76e9e9334b168f8f7ae0b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEB111804103 — a six-check JSON result.
Missa Sancti Josephi, ZWV 14: No. 4 Laudamus te
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb33c37213412c39bc3ecada4d8cd660c7f423d830f9f1c7203a25d52a1721a. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111804104 — a six-check JSON result.
Missa Sancti Josephi, ZWV 14: No. 5 Qui tollis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bdbd3d47decf167518a553ac81b7adbec4dd0f45e3ad88296d18f76d1091d0. 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/DEB111804105 — a six-check JSON result.
Missa Sancti Josephi, ZWV 14: No. 6 Qui sedes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a11439891282ef942e311d02edf94913217f190748c4bde99ec3f09b18b127. 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/DEB111804106 — a six-check JSON result.
Missa Sancti Josephi, ZWV 14: No. 7 Quoniam tu solus sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2d1e54f08c3ddd9fec058b56063b72dec1199fca38812bb50f7ea973347e35. 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/DEB111804107 — a six-check JSON result.
Missa Sancti Josephi, ZWV 14: No. 9 Sanctus - Pleni sunt coeli - Osanna I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbea40d4537d18ed24141058c8138e72b5f5cfe2240826ac0c4317e5525ba94. 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/DEB111804109 — a six-check JSON result.
Missa Sancti Josephi, ZWV 14: No. 10 Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4b1a5ea247b51d9966e08707280d28b2ea70eb507254c123eca22a89501e6a. 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/DEB111804110 — a six-check JSON result.
Missa Sancti Josephi, ZWV 14: No. 11 Osanna II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9f38ecc549447c2227ba90fb41acdb90d6bb8971f2eb7e27be98a386a0c8c1. 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/DEB111804111 — a six-check JSON result.
Missa Sancti Josephi, ZWV 14: No. 12 Agnus Dei I/II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55857ec1776e7e800305fae6828968bae0e527befc08b8e154416445d374ae49. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111804112 — a six-check JSON result.
Missa Sancti Josephi, ZWV 14: No. 13 Dona nobis pacem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d90dac357cfab33c8df12f614889ad7e6f3ef2d86c4e0a030277bd9cf1a739. 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/DEB111804113 — a six-check JSON result.
De Profundis, ZWV 50: No. 1 De profundis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759b698bb71d87b978796e4c27bebc46d222783918a7dee57411077aad83be3b. 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/DEB111804114 — a six-check JSON result.
De Profundis, ZWV 50: No. 2 Si iniquitates
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f8ea7241fd14184cb6cab7538aed9b77319c51be8fee7674cf4bd1a44e3df4. 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/DEB111804115 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1be75a955960e84d7a872be4838655ebef574603068cec0092a2634b74ba9e. 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/DEB111804116 — a six-check JSON result.
De Profundis, ZWV 50: No. 5 Requiem aeternam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47bd82af1a8eaa3fe127abfa4ec7eb7e01c867770bffdd79a6d57f757b1fe69. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111804118 — a six-check JSON result.
In Exitu Israel, ZWV 84: No. 1 In exitu Israel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342d05fa5bc6d344cdacd38d0f09ae177d228463a45444ff65a0b1c470ecea7b. 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/DEB111804119 — a six-check JSON result.
In Exitu Israel, ZWV 84: No. 2 Simulacra gentium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5936d605ae97f5f12b364517d52dd367ccee4c2c3a05ea94726534c6dcedcd96. 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/DEB111804120 — a six-check JSON result.
In Exitu Israel, ZWV 84: No. 4 Sicut erat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5825e1a6a71f95920f7274a7dbe1f948994ef460fa03d1354006f8249b124ac5. 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/DEB111804122 — a six-check JSON result.