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 0x4d494715d2e2f945441ecc4a762e8e3d9fce7c4658da04f96972df19dda733f5. 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/6aa95ed9-75e2-4a35-ab94-033ef8bdfcb0.json and https://artists.proofprofile.net/proofs/artist/6aa95ed9-75e2-4a35-ab94-033ef8bdfcb0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Zauberflöte, K. 620: Ein Mädchen oder Weibchen (Arr. for Oboe & Orchestra by François Leleux)
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 0x517c7ae35ccdce6771441341bc1749c35962c0110c8bef44643da1aa81edf185. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEE860800580.
Orchestral Suite No. 2 in B Minor, BWV 1067: Minuet and Badinerie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e1cec6697bc68c0f103bd4108d3df7a164452e0c613764345ec52352428b0f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USBC17500222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c84631f5947f6c6ae3f0c28049f710d27647d596fdb4e388dd5ed3b38aab1e7. 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/DEE860901329.
String Quintet in E Major, Op. 11, No. 5, G. 275: III. Minuetto con un poco di moto - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0356f8a55231bd18021781691e96eaba20395c5842e87ecb1ec9950c51c9c8a. 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/DEE479100197.
Sonata for Violoncello and Basso continuo in E Major: III. Siciliana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa662674b29701e78f8416d404e47488c3feae980d7cda1cb4572657f1111de9a. 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/DEE471300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148bfd4ac6f860ed4f86e4383d332b06631e40f749ac87daa471ff7a1c130df5. 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/DEE860500759.
Solomon, HWV 37: The Arrival of the Queen of Sheba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c2ed43b7c9d00df9863ec77516a77444552cf7b13d8744a9034cbd359342fb. 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/DEE860701032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86da906b7fa88690dba7de7386fc1ab784bf6c2a94296eda3a9968371094e63f. 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/USSM11001000.
Piano Concerto No. 21 in C Major, K. 467: II. Andante (Arranged for Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5064979c3a5651aabccd3efef70b0d26ad03757f53f7be35f5fcb0406ba6fc5. 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/USSM10310661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1e5a886bba9f3d5df0c410369af12a97565aef88393b53e61c82b288b26fb7. 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/DEE471200034.
Serenade No. 13 in G major, K. 525 "Eine kleine Nachtmusik": Rondo. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64eb968410993716dec59e4d9c3582153fb79c2e85ae5375230db0a16be7d6f6. 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/DEE478000335.
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
Beethoven: Septet, Op. 20 & Sextet, Op. 81b
Weber : Clarinet Quintet / Devienne : Fagotto Quartet / Mozart : Fagotto Sonata
Clarinet Concerto No. 1 in F Minor, Op. 73: I. Allegro - Cadenza: Heinrich Joseph Baermann
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb3e1f89512e2652eb8c46c17e144c52e75feabd87418a74aec03bac61fee78. 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/DEF056702411.
The Ultimate Most Relaxing Beethoven In the Universe
Stress Relief: Healing Classics to Restore the Soul
Orchestral Suite No. 3 in D major, BWV 1068: Air on the G String
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086f0f719ef05928f061f9214aafe92ae4ad20921d87d4106110a57398a98f9a. 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/USSJ10401164.
Water Music Suite No. 1in F major, HWV 348: VI. Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ecb610eb60e1a1b87714b7cfc75d534eb573c46a9c619868474cd6fed8f289. 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/USSJ10401167.