1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xfd2779a5d06708b52eb9bcb44cc88a72c4d58686885dff7d3cfb12f702395e5f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9108416-2269-4941-a77d-823de7969744.json and https://artists.proofprofile.net/proofs/artist/b9108416-2269-4941-a77d-823de7969744.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Totentanz, Op. 12, No. 2, 14 Spruchmotetten Zum Totensonntag, M. 1675 Chor a Cappella Und Sprecher
Choral-Passion, Op. 7, Erster Teil: Der Einzug
Choral-Passion, Op. 7, Zweiter Teil: Judas Und Der Pharisäer Rat
Choral-Passion, Op. 7, Dritter Teil: Das Abendmahl
Choral-Passion, Op. 7: Vierter Teil: Gethsemane
Choral-Passion, Op. 7, Fünfter Teil: Kaiphas
Choral-Passion, Op. 7, Sechster Teil: Pilatus
Choral-Passion, Op. 7, Letzter Teil: Golgotha
Quattro pezzi sacri: Laudi Alla Vergine Maria
Singet dem Herrn ein neues Lied, BWV 225
Der Geist hilft unsrer Schwachheit auf, BWV 226
Songs of Hradcany: 2. The Weeping Fountain
Symphony No. 8 in E flat - "Symphony of a Thousand" - Part Two: Final scene from Goethe's "Faust": "Alles Vergängliche"
Jongens en meisjes van het Kathedrale Koor St.Bavo, Haarlem
Bach, JS: Magnificat in D Major, BWV 243: I. Chorus. "Magnificat anima mea Dominum"
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1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2969676cf8f4c09e5d1f0f6faa85e654eca62fd262fd4b9bdca868a073594729. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0K7zNAcWAv1y8vYC6BUZNN.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0K7zNAcWAv1y8vYC6BUZNN.
Bach, JS: Magnificat in D Major, BWV 243: IV. Chorus. "Omnes generationes"
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{"copyright_id":"0x2969676cf8f4c09e5d1f0f6faa85e654eca62fd262fd4b9bdca868a073594729","isrc":"GBAYC8803587","name":"Bach, JS: Magnificat in D Major, BWV 243: I. Chorus. \"Magnificat anima mea Dominum\"","registered_at":"2026-06-20T03:37:04Z","spotify_id":"5wMcPVgmOqwnMgH2vOKR0p","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2969676cf8f4c09e5d1f0f6faa85e654eca62fd262fd4b9bdca868a073594729. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5wMcPVgmOqwnMgH2vOKR0p.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5wMcPVgmOqwnMgH2vOKR0p.
Diepenbrock: Anniversary Edition, Vol. 7: Works for Choir a cappella
Magnificat in D Major, BWV. 243: I. Magnificat anima mea
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2969676cf8f4c09e5d1f0f6faa85e654eca62fd262fd4b9bdca868a073594729. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7MFlEd45UkQ8FI9TDw1mIL.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7MFlEd45UkQ8FI9TDw1mIL.
A Musical Anthology of the Northern Netherlands