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 0x163cbf6232df4b1d06232ed993434d77f64d3f86455eba5cbaad0a2f4aaa377c. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f19ab0f-0429-4e1c-a21e-8347cc639968.json and https://artists.proofprofile.net/proofs/artist/8f19ab0f-0429-4e1c-a21e-8347cc639968.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Württembergische Philharmonie Reutlingen
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 0x0a8fe9a34e1aaa51d440b9b900264231258abccd7a4b062af736c4c73241a602. 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/NLY331305296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166f8d486bd62b89ebd9c1272a5c7e355ef38c6abe53004c08563bfd6a2797c5. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/NLY331305297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060b9b630fcc00cb2616b94377ea2eb81bec765771178b01ad9501a73ce11e4c. 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/NLY331305298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde60f0621a98f7cc2f948baaae46492179cae3f724ff22be40e35404609d7029. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NLY331305326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbf576269c80a2ad359269c5469b8f7db9b0ba36c8d3bd2da1d7c7daa662bec. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/NLY331305327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfc5361fa169b7ef32e090660cb8afc8d3cef8e423fd6adeeadfc52198759e0. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/NLY331305328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e768bde4ee3701b3e4d8365092720c589012c9860211ea1afb66bd8c53fb75. 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/NLY331305329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c907318d0dc728252a82b679e26437f8b21d395c133eccb2b30d7c17cea99fa. 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/NLY331305330.
Choral Classics: Mendelssohn (Sacred Choral Works)
The 5 Psalm Cantatas, Psalm 42 'Wie der Hirsch schreit', Op. 42: I. Coro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb975e02a9411280a07e947b501d51250a79a25e626e4d8a7a714b396621b7c4. 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/NLY331106628.
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: III. Recitativo. Aria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b15e1a5a968fe458d4bd1e65e4e770bed3b883df643b3337026b13a918a9194. 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/NLY331106630.
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.
The 5 Psalm Cantatas, Psalm 42 'Wie der Hirsch schreit', Op. 42: V. Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb611036fce2c1de1b38d8593f353635e39cc931144944cb2b514b7f5e6e7f3. 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/NLY331106632.
The 5 Psalm Cantatas, Psalm 42 'Wie der Hirsch schreit', Op. 42: VI. Quintetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f99173cb407c6a16f97b1061575d94afb1de7a4a953d9c2f3320e420c912427. 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/NLY331106633.
The 5 Psalm Cantatas, Psalm 42 'Wie der Hirsch schreit', Op. 42: VII. Schlusschor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b80349b38715e82681654fd1ed955404a216352ce3415190425ba9acf9e26e2. 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/NLY331106634.
Psalm 95 'Kommt, laßt uns anbeten', Op. 46: I. Coro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a61e8b9d8bbf0abd7962ab7e23f43812968e0a484e0512b53a5092a523dae9d. 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/NLY331106635.
The 8 Chorale Cantatas, Chorale Cantata No. 1 'Ach Gott, vom Himmel sieh darein': IV. Chorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9717f1e33a9e7452daa952f97d9b9aeca35ac1dcafe64add20c140d3ff647345. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLY331106655.
Messe, Mass No. 1 In D Minor, For Soloists, Choir and Orchestra: Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66da094d13307e4bfd42265cbbce3401885a0b99e9d9fe613a2a07b22ebe507. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLN580541594.
Messe, Mass No. 1 In D Minor, For Soloists, Choir and Orchestra: Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98801fbb1ea2fbf63bb71a23f659a3c2e5d29481f120413f386cdfee7e8ee326. 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/NLN580541595.
Messe, Mass No. 1 In D Minor, For Soloists, Choir and Orchestra: Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6485fab139e74db95bd9f36425733d987f568e993961ee97bbd08c12edf44b. 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/NLN580541596.
Messe, Mass No. 1 In D Minor, For Soloists, Choir and Orchestra: Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd115985566a8096d315bb5056c04718e1561ed848f83cba9216718bc54ba5e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLN580541597.
Messe, Mass No. 1 In D Minor, For Soloists, Choir and Orchestra: Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82966884c985a397610489086ecad008f67a808f98cf57a9b4702b701c596e30. 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/NLN580541598.
Messe, Mass No. 1 In D Minor, For Soloists, Choir and Orchestra: Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb4317c18c716018ef692f53a6130239871f60fbc484e8da657e99b2825d716. 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/NLN580541599.
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.
Rossini: Messa di lugo & Verspro lughese