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 0xa4c933ab0e40ad0d8908e5ded8df215678fcf76f7494f4066cb7e717c0cf808e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68e93f5f-fb6b-4e8d-a742-5e7950c0416f.json and https://artists.proofprofile.net/proofs/artist/68e93f5f-fb6b-4e8d-a742-5e7950c0416f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xc5e4466c8704644f29611fcaff388ba5cd206f5e823ffdaa74b625dbcda24342. 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/DEB112304304.
Le deluge, Op. 45: Part II: L'Arche - Le Deluge
Figuralchor Der Gedächtniskirche Stuttgart
Württembergische Philharmonie Reutlingen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852f201695aeb4bc4c8ed78506df58e7a09a2f8f872dc8849272951baaceccf9. 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/DEFG21212705.
Le deluge, Op. 45: Part III: La Colombe - Sortie de l'Arche - Benediction de Dieu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe42d5befdfc6e8b35e6879aae3e6c64780c5cfb7d73269b9e48b4f1346e063. 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/DEFG21212706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce232ddd6af2b602e2fd8a5b5b4c33d89a6e3df78a17dbfad8f9e85b98f2993b. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG21212703.
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
Le deluge, Op. 45: Part I: Corruption de l'homme - Colere de Dieu - Alliance avec Noe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c4b64806e91f594fec04298bb2be0ec1dbe9d37be5cd0670725013c88452f3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG21212704.
Choral Classics: Mendelssohn (Sacred Choral Works)
The 5 Psalm Cantatas, Psalm 42 'Wie der Hirsch schreit', Op. 42: II. Aria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6687d5541c2b37d7082d850a6b9704bc564ff76ba3931b191d366f0c00c03b. 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/NLY331106629.
The 5 Psalm Cantatas, Psalm 42 'Wie der Hirsch schreit', Op. 42: IV. Coro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a5a5f43f0f4181533a70ece86e20dc3e77904960b3f3017fabfd06d7482c67. 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/NLY331106631.
Hymne, Drei Geistliche Lieder Und Fuge Op. 96 Für Gemischten Chor, Soli Und Orchester: Hymne: „Lass, O Herr, Mich Hilfe Finden“
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5300cba59906e2ced400cd4f15454dfb04ee6f68ac83fdb45a44d42caff4aa. 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/NLN580550839.
Hymne, Drei Geistliche Lieder Und Fuge Op. 96 Für Gemischten Chor, Soli Und Orchester: Choral: „Deines Kind'S Gebet Erhöre“
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92d38aa0566613d719b4c58f1256f9f422966e04090f4f7f5f9a9104b2b1a69. 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/NLN580550840.
Hymne, Drei Geistliche Lieder Und Fuge Op. 96 Für Gemischten Chor, Soli Und Orchester: Herr, Wir Trau'N Auf Deine Güte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583118bcb7ae75ff61a8c0d46448b2a2dc61c39d1fc1b521cfd812d1d97439f5. 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/NLN580550841.
Messe de Requiem / Introite: Ia. Requiem aeternam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865321a9b7b1141ee361d47c84f535468c5eb9139f53e7711996ae833f235931. 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/DEB111600101.
Requiem / Symphonie choeur et trio: Ic. Requiem aeternam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf557835cfbb8c2e89ffe052d7d5beb92d809aaea831265502cb0b783b473d95. 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/DEB111600105.
Messe de Requiem / Introite: Ib. Te dece hymnus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e443f14b736b9d9002025287e156bad62a420a2b4b26f67a1698f95eec2cb3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111600103.
Messe de Requiem / Kyrie eleison: IIa. Kyrie I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e19b924fb86ec05c70c19fe061f38c144b4ba0665b11d8a2b866422986d2b7. 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/DEB111600107.
Ligeti: Complete Works for a cappella Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd881d3397860290b8496852edf9ea3eb9a53a19464155730c8d3d71301693825. 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/HKI192138711.
7 Magnificat Antiphons: No. 6, O König aller Völker
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15ae8608fe4a32054ada0b7e1bc78a4d69a4586f210ed835ebcfe4b093b56f3. 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/HKI191522920.
7 Magnificat Antiphons: No. 7, O Immanuel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8362211e5a2e97d7d54b3d937fbef4f4365dbf62d891e17847420c5bbaf1877c. 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/HKI191522921.
Arnold Mendelssohn: Motetten zur Weihnacht - Deutsche Messe