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 0xe8b615208f26fa192f7049bba3bb5e0268f72e18fc0144616decec10ac5838c9. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3599298d-a376-4eb7-8fc3-1d6fbdcda4bb.json and https://artists.proofprofile.net/proofs/artist/3599298d-a376-4eb7-8fc3-1d6fbdcda4bb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Viola Concerto in the Style of Handel: II. Andante ma non troppo
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 0x5e623adbf128a16fbad2947931d7fac72932dbb025803e98209ab2c50b7fe0da. 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/UK2Y21901768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc64e8beeaa59a2567cb183a46765dbee88a4edbdf66503f46839796baa6bf9. 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/UK2Y21901772.
Trauermusik: IV. Choral "Für deinen Thron tret ich hiermit"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8546035f433eea3d290d24670aa54c5ce098bb37ff4de90503e6b6eb85de6e3. 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/UK2Y21901773.
Sonata No. 3 for Strings in C Major: III. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb42ee297729128779c87a080228a1a5c940cb89682341285b3e732ca120fa3. 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/UK2Y21901786.
Divertimento in D Major, K. 136: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32657fd03038ab4a48045c4c4ded55137b100b8a2d4f51d6363c7316ab4fc158. 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/UK2Y21901787.
Divertimento in D Major, K. 136: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5957a987a347965a1c6ef3c090d83932d38ac1a08e29a28fbf7afc83a64b22d5. 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/UK2Y21901789.
Brandenburg Concerto No. 3 in G Major, BWV 1048: I. No tempo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353bc01626e7c2006f3e6d7c7463e1593aa021378aa86067f7e429ae8f213176. 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/UK2Y21901790.
Viola Concerto in the Style of Handel: I. Allegro moderatо
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1d795b0e0c71d86dc94872efe5c4ddf388f0caf253742ecb9cc251f49dc9af. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/UK2Y21901767.
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
Viola Concerto in the Style of Handel: III. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa986cce0e590627843f6b64178e83f72f31e75685512110dcc2269ee4a5e2170. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/UK2Y21901769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fd3767ba3832be8d1862f450cfba1ba5e3f1aafb5114525027951e3dbc097f. 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/UK2Y21901770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8ffb238633f1811a8a2690e9c40ad43178ad85059013887d29d6ead65f8adc. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/UK2Y21901771.
Sinfonia Concertante in E-Flat Major, K. 364: I. Allegro maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838ae988656985d1cd873b070c910ddaf6c6c2cc38e71e48ccb8f1bde6b2c79b. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/UK2Y21901774.
Sinfonia Concertante in E-Flat Major, K. 364: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3daf75abb7725a4a4c2756e0c145b09820665bae7c713ab866936a68bfece751. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/UK2Y21901775.
Sinfonia Concertante in E-Flat Major, K. 364: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaa037d17d4851659867ecebee9b07dba2762e039e8828045b72ea4e07b8375. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/UK2Y21901776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0e79f558ce29f496c6364be0027ce57925b2ad13238317ee4e8c8a207dbea7. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/UK2Y21901782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326bedc4cad7ac2d91e47949699c424cd6a6abcd548fc03a380d5eda754810c9. 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/UK2Y21901783.
Sonata No. 3 for Strings in C Major: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f6e53da2b825cf4de68762ab561fe20f7ffe2a1906dd4fded81003231927f1. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/UK2Y21901784.
Sonata No. 3 for Strings in C Major: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e13dfc026197ff8da3caac24bef5a5e2cbecce32c1e60aee0e37781291c794a. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/UK2Y21901785.
Divertimento in D Major, K. 136: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2500412ed8495724d30de9bb44983faecb34d3f1a92b79e5557dc89fed8794. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/UK2Y21901788.