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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf039a43027ea377f8deb2d2346c73628434608877489c701b898ac7bf60bfb59. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c93fe09c-8400-4eaf-8319-e9faec52dfc3.json and https://artists.proofprofile.net/proofs/artist/c93fe09c-8400-4eaf-8319-e9faec52dfc3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Graupner: Duo Cantatas for Soprano & Alto
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0ed00097196e843284a86fd7d6feac94042b7f0286d1799b8d5c34d539bb88. 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/DEB901800902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc37d6cf0f45268de5c0972b0a4c494b4b6e7bef2b47be8297ae786afd83f821. 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/DEB901800905.
Waffne dich mein Geist zu kämpfen, GWV 1148/20: Aria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f3f0e829a7669b363a26923753e76f2bdef89c1c87e5fd700aa29b13b4a6f9. 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/DEB901800907.
Waffne dich mein Geist zu kämpfen, GWV 1148/20: Recitative
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609329bef55d45c50f7d5f511983f6f29081cf8e9247d4e7e213dc4e6854d4e3. 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/DEB901800908.
Waffne dich mein Geist zu kämpfen, GWV 1148/20: Recitativo II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e67896e8932269b6e881592f01182e16b009c8689809d3e0440dfe54ce26dca. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEB901800910.
Wenn wir in höchsten Nöten sein, GWV 1143/12: Recitativo accompagnato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1822b0bf862a8821cb3b2300d008ccd91e9f79835ae5324fc1cbd4c6d66520cc. 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/DEB901800915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ced305ebc35972221595f0a88e6f478ec5141786589c1d980a47b765d997d7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEB901800918.
Weg, verdammtes Sündenleben, GWV 1147/20: Aria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a643534d7b8611db77887c391ecc4833483602817dfb4ef489c26689ae1601. 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/DEB901800919.
Weg, verdammtes Sündenleben, GWV 1147/20: Aria II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4300e8c3010d15e19d81d7d3974a4d9b1bbdb30e3980c218ec02b1c98ca6dd7a. 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/DEB901800922.
Overture in F Major, GWV 445: V. Le Desire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f683191f61ed2d73e1b3539c278edb145d15ce58382266320c15c5931594cb. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/DEB901800901.
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 0x82675dc0eeb35445da64b7623e74c45f21cb7fee8161ce7b5c137567e5d4f161. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEB901800903.
Demütiget euch nun, GWV 1144/12: Recitativo accompagnato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4c4c7f2e75c6ab08c3f6ab00c12793087a63c3a80af6d25d95dcdacd9f32df. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB901800904.
Trio Sonata in D Major, GWV 204: I. Affettuoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c1ea26e9d73d70f761d0ebf30daca46284cb3734372671e81397304dd5da2c. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DEB901800906.
Waffne dich mein Geist zu kämpfen, GWV 1148/20: Aria II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f59cb349e990a5d6d3d025e2a4e9febe1f67241d74d07ec7d1b90399d21c4a. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/DEB901800909.
Waffne dich mein Geist zu kämpfen, GWV 1148/20: Duet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa842fe3f39bae21ab5e998908e9b54b54126bf5ff3584daaa43879de70d8e651. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEB901800911.
Canon in B-Flat Major, GWV 218: I. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfc766c37a4c69d4a20f5bb7870af30bc69519101300cd7d3ce98e3a881989a. 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/DEB901800912.
Wenn wir in höchsten Nöten sein, GWV 1143/12: Choral
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44088f4896de1dd39990092279918e63dad542424ecf8fc0e415a475fd4ec36. 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/DEB901800913.
Wenn wir in höchsten Nöten sein, GWV 1143/12: Aria à 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b6cf61347a9858247e239bf07cc7eaf3494c8bdca8937174eb822bd5f77cfa. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEB901800914.
Wenn wir in höchsten Nöten sein, GWV 1143/12: Aria à 2 II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbfa01d96c2637193d14f340202af1dfb6c241fe1ce5b81ddae5cdad9b9450d. 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/DEB901800916.
Wenn wir in höchsten Nöten sein, GWV 1143/12: Duet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d6d19bc444c3afea2414429a0f71c33ba1e4d1e77c68dcfda229b15ac12103. 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/DEB901800917.
Weg, verdammtes Sündenleben, GWV 1147/20: Duet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b54f6755c9642e486f1ba5dd75f0932280773d6ab0e77f4e7bdec730856041c. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/DEB901800924.
Richter: Sinfonias, Sonatas & Oboe Concerto
Sinfonia in B-Flat Major, VB 59: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf844f4ccbb465017c16d63eaa6f8053fe46335d7625280e2383e0b97e067df63. 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/DEB901700802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7078789ff63ff8b424003ae5e727f4fdd9c437cc474a7fd856484e535d27c0. 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/DEB901700808.
Oboe Concerto in G Minor: I. Andante allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0160c2b0226485677a7efc47f58a4196979cbd6158faf2bdf295c92af8d309. 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/DEB901700809.
Trio Sonata in A Minor, Op. 4 No. 6: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a177805bd1911d0e8fb6b134d5bec69c91fb2ab2d36df3425b28a7025824a06. 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/DEB901700805.
Graupner: Himmlische Stunden, selige Zeiten
Mudge, R.: 6 Concertos A 7 (Capriccio Baroque Orchestra)
Concerto a 7 No. 6 in F Major: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b876fd693c1750a18a4d862ef5883e7aa7646477fb55007096f619bfe2ea052. 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/CH0040900630.