Frankfurter Kantorei (Frankfurt chorale) is a German mixed concert choir established in 1961 by Kurt Thomas in Frankfurt. In 1969, Helmuth Rilling assumed leadership, and the choir began recording the
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 0xdf6b920b496a96bc5f8a92a012817cddc1265a155d12e9d7de16d54731573a7f. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0de2d19-21bb-4ed5-9595-92571d507f55.json and https://artists.proofprofile.net/proofs/artist/f0de2d19-21bb-4ed5-9595-92571d507f55.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Josef Gabriel Rheinberger: Musica sacra (Box mit 10 CDs)
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 0xcf8e5f3889dbcf4d32bd6aa452469c819a35b3f80bdbd089afdce22285a22f57. 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/DEB111502508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba0ae1579787b4102bc2871bf9049d86549401e3008f27f14a26e6211992f73. 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/DEB111501610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03f58782c117eba0875ba246f990aa00983f401e91b2e439844ddf24e32fbad. 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/DEB111501814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77541cac25396630d7795a707bafefb2da4d3a0d5883266bcaf859d3b5918ede. 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/DEB111501816.
Orff: Catulli Carmina - Stravinsky: The Wedding
Honegger, A.: Roi David (Le) (Sung in German)
Rheinberger: Missae et Cantiones (Musica sacra IV)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ec1c173b43e70747a5c51846990b205cf1ee0892bd5830ddcce15710f91e85. 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/DEB119700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5424bbd2384108b10a7d0c16672ef2385231d17b206a096339fbcc07fc5dc052. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEB119700202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc21b81c6b1179177a8452766de37da260fa8f303914c33be609e7d3f6fa916. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB119700203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8b736d37b60564462a8a7cf4673828401bd722ecea77b019ca5cb09c0fa940. 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/DEB119700205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38be570413ff33d8544306d8d1dc0b47b9c5077fb907582cdba71ac2484e4eca. 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/DEB119700206.
Sacred Masterpieces Stuttgart Gachinger Kantorei, Stuttgart Bach Collegium, Rilling
Wachet auf, ruft uns due Stimme (Chorus)
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Wachet auf, ruft uns die Stimme, BWV 140: Chorale: Zion hort die Wachter singen (Tenor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f98257577f959958660e45c41d44101c5397934cbc807d2740c831e7bf031ae. 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/DEA559903006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6244707874e546cc96c94ea63403d1d7528718eaf59cb2cba5d6bd381cae6fd. 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/DEA559321246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04980f65bc764656f4858e2fea60bc09f2a23ab4a23023bea3653821e82be7d5. 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/DEA559321247.
Deutsche Messe, D. 872: Zum Sanctus: Heilig, heilig ist der Herr
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Elijah, Op. 70: Hebe deine Augen auf zu den Bergen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cba064557946f6626ebde5e6769abb9a60d3a03f95d881abc7ad4798dbed68. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA559321253.
Jesu, meine Freude, BWV 227: Jesu, meine Freude
Figuralchor Der Gedächtniskirche Stuttgart
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Herz und Mund und Tat und Leben, BWV 147: Chorale: Jesus bleibet meine Freude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0284504efe6f789b807992c31f05dade2dcc0c6dd61b110ab5ffc69eb36c7521. 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/DEA559413656.
Bringet dem Herrn Ehre seines Namens (Chorus)
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Man singet mit Freuden vom Sieg (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd570f197c3fb7bf2375eb5f47c9d768081c3d325096a2c806d91f12603b7222d. 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/DEA559903052.
Man singet mit Freuden vom Sieg, BWV 149: Aria: Gottes Engel weichen nie (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7153247ab1e8e5118158782c44c0fed05c6676a316795012979245931c945e8. 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/DEA559903055.
Wir mussen durch viel Trubsal, BWV 146: Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f95b347ebbb0221b9694407abaf09bd7ce1d8d84b413e4e50b19d6883a5f69. 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/DEA559903028.
Herz und Mund und Tat und Leben (Chorus)
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Herz und Mund und Tat und Leben, BWV 147: Chorale: Wohl mir, dass ich Jesum habe (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d27e3a993a01509a46190c1f835491d592571f0c45e98294ae1311843b3aa29. 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/DEA559903041.
Denn er hat seinen Engeln befohlen uber dir, "Psalm 91"
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d4d0bba4ca6396c36abe1974ca394e459475e6dab4d7e8b6709051783f255d. 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/DEA550010768.
Masterworks of Worship Collection Volume 1 - Great Choruses
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ce9c21b0e3b0ee2f5c4cced8339d10a243047be629ccc6867c559d4a84d044. 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/DEA559800344.
Es erhub sich ein Streit, BWV 19: Recitative: Gottlob! der Drache liegt (Bass)
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Scriabin: 3 Symphonies; Poéme de l'extase; Poéme du feu (Promethée)
Bach, J.S.: Complete Sinfonias from Cantatas (Rilling)
Choral Music (Sacred) - Bach, J.S. / Telemann, G.P. / Scheidt, S. / Cruger, J. / Mendelssohn, Felix / Franck, M. / Resinarius, B.