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 0x774fa98cc8f9c9e32b6f83908fc7664e19bc2080b70ffc635b422feac03eca58. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f02e399-ca43-49ce-a64a-8ff04c294879.json and https://artists.proofprofile.net/proofs/artist/9f02e399-ca43-49ce-a64a-8ff04c294879.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Die Geisterinsel, Act II: Lebt wohl, ihr Herrn!
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 0x274fdacc49bd9f8f6229fd109e053f1251039f6ba11e3604496b09fc592b325b. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEB200254829 — a six-check JSON result.
Kuhnau: Magnificat in C Major: I. Chorus. "Magnificat"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904a6c653403dc7b469b2a19fe28d22a334f251359d476284472983309912c9a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEA621701234 — a six-check JSON result.
Kuhnau: Magnificat in C Major: II. Aria. "Et exsultavit"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d7dba5fe77766a58847e099589f1a4b4a405bbf7e0480418c93179dbe748d1. 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/DEA621701235 — a six-check JSON result.
Schelle: Magnificat in C Major: III. Christmas Verse. "Vom Himmel hoch"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5182d8e1e8a471a714bde624fb9b666ff64a2814635de2798421d5ddb90143c3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA621701236 — a six-check JSON result.
Kuhnau: Magnificat in C Major: IV. Aria. "Quia respexit"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139dcc1216bd8f991f9aa105c3b507786fb8e51f8ecdfba2b5d6695e4a01d197. 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/DEA621701237 — a six-check JSON result.
Kuhnau: Magnificat in C Major: V. Chorus. "Quia fecit"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e93b5d7fdc3a66d6405825e3a67f62804a4caa54cd76ea63e94868b44fe7c1. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DEA621701238 — a six-check JSON result.
Schelle: Magnificat in C Major: VI. Christmas Verse. "Freut euch"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ace528f60d87fb6ee23fff1d6ecbcb87463175e2adfc69a5fddb5cbecf0fff5. 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/DEA621701239 — a six-check JSON result.
Kuhnau: Magnificat in C Major: VII. Aria. "Et misericordia"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece4db703fc82589dd9cfccdfa418b54c50881b997ff62999541f571d43fcbed. 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/DEA621701240 — a six-check JSON result.
Kuhnau: Magnificat in C Major: VIII. Chorus. "Fecit potentiam"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2c2430580356fd23ba4f0dbd9a3aa38908531a8e321228e780b5d94bb9a3ab. 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/DEA621701241 — a six-check JSON result.
Schelle: Magnificat in C Major: IX. Christmas Verse. "Gloria in excelsis Deo"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09fb1c824644586867846340250e6b581c84d1713937539c4bef3415910d4f8. 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/DEA621701242 — a six-check JSON result.
Schelle: Magnificat in C Major: XI. Christmas Verse. "Virga Jesse floruit"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ec3a227057236a7d17c6750d611ea5cb7d4e968955da28ecc17b29c20d30d7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA621701244 — a six-check JSON result.
Kuhnau: Magnificat in C Major: XII. Aria. "Suscepit Israel"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb935015988b1b8ef4bb2a96b0bc111609f0f43210501ae79dd9675c73d987f. 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/DEA621701245 — a six-check JSON result.
Kuhnau: Magnificat in C Major: XIII. Chorus. "Sicut locutus est"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744f280bd768dacd08736f4ab23c8879bfd6ee86349631f351357238e769eccd. 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/DEA621701246 — a six-check JSON result.
Kuhnau: Magnificat in C Major: XIV. Aria. "Gloria"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5bc05679665ea5b535fad40dcf0bb95009257d3a6cf6c22fcbadc8f398537f. 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/DEA621701247 — a six-check JSON result.
Kuhnau: Magnificat in C Major: XV. "Sicut erat"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff070e9c820a580c314793b1bca5b278051c7d9c62551dcc742148c59c333f5f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA621701248 — a six-check JSON result.
Caldara: Magnificat in C Major: I. Chorus. "Magnificat anima mea"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec8f86dbfe82f50126191df561feb70a841bdf46d7da0c5542e6ed2f61e2f14. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEA621701229 — a six-check JSON result.
Anonymous: Magnificat in D Major: XII. Chorus. "Sicut erat" (Formerly Attributed to Kuhnau)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba64280879b797e0335a6f73bf0dfce03e0944dd18b3cc5fb3e8116a6284db29. 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/DEA621701260 — a six-check JSON result.
Handel: Israel in Egypt, HWV 54 (Arr. F. Mendelssohn)
Hummel: Der Durchzug durchs rote Meer, S33
Telemann: Das befreite Israel, TWV 6:5, Overture in F Minor, TWV:f1 & Der May, TWV 20:40
Bach, J.S.: St. John Passion (Arr. R. Schumann)
Stölzel: Ein Lämmlein geht und trägt die Schuld
Ein Lämmlein geht und trägt die Schuld: No. 1, Ein Lämmlein geht und trägt die Schuld
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21aa5ed5c1b9fb2a3f7e2c18617c58ae1fb3bf65e76949db9fd628e31109be39. 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/DEB201931101 — a six-check JSON result.
Ein Lämmlein geht und trägt die Schuld: No. 7, Wenn die Welt mit ihren Netzen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4d81bd0b8b19297d16180edeced900acadd5ffd9acacd46fe762c8bc852c1d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB201931107 — a six-check JSON result.
Ein Lämmlein geht und trägt die Schuld: No. 18, Ach! Was soll ich Sünder machen?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e6308d98b547bf992827469816b518eaabd22ec324bbb040597a301d112537. 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/DEB201931116 — a six-check JSON result.
Bach: Funeral music - 11 Motets (excerpts) - Missa brevis
Bernhard: Geistlicher Harmonien & Other Sacred Concertos
Fasch: Mass in G Major, Overture in A Major, & Ich danke dem Herrn von ganzem Herzen
Hasse: Mass in D minor - Miserere in C minor
Telemann: Der Tag des Gerichts (The Day of Judgements)
Bach: Die Kindheit Jesu (The Infancy Of Jesus)
Telemann: Die Tageszeiten / Daran ist erschienen die Liebe Gottes
Melani, A.: Europa (L') / Beatus Vir / Magnificat
Telemann: Drei sind, die da zeugen im Himmel
J.C. Bach: La clemenza di Scipione, W. G10 (Live)
Passionsoratorium: O Seele, deren Sehnen aus heil'gen Augen weint (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a0ae192bd6f4ef49684ba0fe8e02700cfcacc330b8e25fdcc49311f918bc05. 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/USB8U1010404 — a six-check JSON result.
Die Konige in Israel, Op. 186: Part 1: So lasst Trommetten schmettern (Chorus of the Philistines)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44cf66f1883c2463c4a5dea61ff556197f400a700852540ae486cfc95417196. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEB200722114 — a six-check JSON result.
Passionsoratorium: Kommt! Lasst uns anbeten (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a8eb873696c1eb0732b132614bf655373e9626e4824695618251f54335af15. 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/USB8U1010405 — a six-check JSON result.
Passionsoratorium: Ist's moglich, Vater (Tenor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2dac8282cf034ca3c40b3725e9006dea570e6be8ce17a2e40eca67aa0dc69d. 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/USB8U1010406 — a six-check JSON result.
Meine Seele erhebet den Herren: No. 1. Meine Seele erhebet den Herren (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfceafa8db512161e9054675727cdac71c46ba424c07713f89ed6c74f5bcac458. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USB8U1010440 — a six-check JSON result.