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 0x6bdcf8d97dd28ff4e737b5da0ca72e0853ba2b9aba83b387925ea308aa872685. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/589cf2dc-a6b3-40f3-b9ef-5a81fbd9e3ff.json and https://artists.proofprofile.net/proofs/artist/589cf2dc-a6b3-40f3-b9ef-5a81fbd9e3ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x0fba5c66230fd8a2ba85375c6f8bfb525fe22d10e5117901063e1b189c4a9d64. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEN420501008.
Mein Gott, warum hast du mich verlassen, Op. 42: I. Mein Gott, warum hast du mich verlassen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966f4bdbe8dcee92eaa3f1ba2695f7359211cd7d9a0ed38bb60d607f1d62a1f5. 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/DEN420501010.
Corelli: 6 Violin Sonatas, Op. 5 (Arr. for Flute)
Bach, J.C.: 6 Sonatas for Keyboard With Flute Accompaniment , Op. 16
Flute Concerto in C Major, QV 5:15: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8660735d0ebb3688a1caa8cc15f8c365304055c72ed014bcef11e3cd34b73d6d. 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/HUA253191607.
Flute Concerto in G Minor, QV 5:196: I. Allegro di molto, ma con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6a599eaddb114394e7ac685c62525d06e2076a5798438c8518ffa8a7a8895d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/HUA253191601.
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
Flute Concerto in G Minor, QV 5:196: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e79cab9e596fa99e3a6fb954a81d93c80ceb36e25d167f1bca2364cf39b08f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/HUA253191602.
Flute Concerto in G Minor, QV 5:196: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c76103127230fced6962e9a122e741b5e7382d1e118a9ea25ba54b30f4bdb2b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HUA253191603.
Flute Concerto in D Major, QV 5:74: I. Allegro ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5b8b6dbfd30465a9459db8de2ca9238f82e0db28727aaa69d445f6fd1f76d6. 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/HUA253191604.
Flute Concerto in D Major, QV 5:74: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225e6b2f59c9a15c332984ce53ddebae46cc3d845aea17f975b2cb3dc271214d. 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/HUA253191605.
Flute Concerto in G Major, QV 5:174: I. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb984f7a1d3bad64e2a92616cecf1afb3e53be444c7f07d39192ccf1384edca4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA253191610.
Flute Concerto in G Major, QV 5:174: II. Arioso e mesto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae3a6e06f0e8517d57adc41b500d23d5e59feae4554522013019c4b56df29e6. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA253191611.
Flute Concerto in G Major, QV 5:174: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088360c7be1f1bd6071a7ab0f7b3eaa18b2bc05ed2badb4e38bec7de89fcd728. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HUA253191612.
Bach, J.S. / Bach, C.P.E. / Quantz / Telemann / Fischer: Solo Flute Works
Sonata in E Major, BWV 1035: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82b194b4faa537dddabbe7014a5c69cecf0153327fb939da6e9497ca90dd887. 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/DEY320404002.
Sonata in E Minor, BWV 1034: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dda7632b5318bcde6da0dc19b2850e1ae5150322554d614315253bd3d9dba23. 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/DEY320404006.
Sonata in E Minor, BWV 1034: I. Adagio ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e9bab764b936b1683dc314ffc6487f8d27ccece5ea23935f72360e60ca7f92. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/DEY320404005.