thumb|Christuskirche, Mainz, view from the west Diethard Hellmann (28 December 1928 – 14 October 1999) was a German Kantor, composer and academic teacher, first in Leipzig at the Friedenskirche and th
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 0xa17d3fc04515c02ff4c9fc63226bc16b8109342ed93b0c6c35443a44acd80b1c. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f067a2c6-b6e0-4579-9886-49601eb58dcb.json and https://artists.proofprofile.net/proofs/artist/f067a2c6-b6e0-4579-9886-49601eb58dcb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Saint-Saens: Oratorio De Noel (Christmas Oratorio), Op. 12
Classical Music for the Christmas Holiday, Vol. 1
The Nutcracker, Op. 71: Danse de la fee (Dance of the Sugar Plum Fairy)
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 0xb621bb64d2a8ba219e2f6950b867120bfdd619a982db2f1b804d3a8549c85c39. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USB8U1613247.
Thomanerchor / Gewandhausorchester Leipzig / Thomaskantor Günther Ramin spielen: Johann Sebastian Bach: Kantate "Ich hatte viel Bekümmernis", BWV 21
Hoffmann: Meine Seele rühmt und priest (Formerly Attributed to Johann Sebastian Bach as BWV 189, Mono Version)
Solokantaten und Lieder des Barock (Mono Version)
400 Jahre Marianische Männerkongregation - Festmusik in der Bürgersaalkirche München
Bach: Cantates, BWV 187 & 34 (Mono Version)
Oratorio de Noel, Op. 12: Tollite hostias (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9e0cfcdb739e71710ec6ecf02b5d00610e9f73840f858d2fab178e8a1e8c10. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEAD60502310.
Oratorio de Noel, Op. 12: Prelude (In the Style of Seb. Bach)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724b66ff13bbb811415f9404d336abc4921589cca1c7239d6c9a3f5f22fa5552. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60502301.
Oratorio de Noel, Op. 12: Duet: Benedictus qui venit (Soprano, Basso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdfed2f104715fb619b32a39796ad00495a800676e7987b93ee61a3ee8564da. 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/DEAD60502305.
Oratorio de Noel, Op. 12: Recitative and Chorus: Et Pastores erant - Gloria (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b4952836c41f12b7a761103bda6686d620479694bfe606853ebabe888c98b4. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DEAD60502302.
Oratorio de Noel, Op. 12: Quare fremuerunt gentes (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57dc6c3b5e8c5636de0b8675dca2c7f32c913fa7ce405fce744af621c3ef52e. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DEAD60502306.
Oratorio de Noel, Op. 12: Air: Expectants expectavi Dominum (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9011c0134a9ebc65f0e0cb958ee2dbf1a6b4b83f8add04a1a4c3d4fb273295f. 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/DEAD60502303.
Oratorio de Noel, Op. 12: Air: Domine, ego credidi (Tenor, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3a3f2f4693e1874a511dc0f9b3fef3217e0bd2ae36f5d18d39da94dbbc556c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEAD60502304.
Oratorio de Noel, Op. 12: Trio: Tecum principium (Soprano, Tenor, Basso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dcf210dba839ac413823ac91c9bc6777e5e49d83fd364613449177af66cbb0. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/DEAD60502307.
Oratorio de Noel, Op. 12: Quartet: Alleluja (Soprano, Soprano, Alto, Basso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42ea3e93425d926baa2f62b2d61f45876a606f9d2186f1c08392a8a24b7edf9. 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/DEAD60502308.
Oratorio de Noel, Op. 12: Quintet and Chorus: Consurge, Filia Sion (Soprano, Soprano, Alto, Basso, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d9ab36b912ac867e7b9b50cc025dec9bd0b92b97a2c1202256609a9e588934. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEAD60502309.