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 0x59820a62b79fae7bb6c9408f26d229d04c3fa70d33924279f918d31f19f46e7c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/427826b2-cebf-40da-abbd-3c373cfd3302.json and https://artists.proofprofile.net/proofs/artist/427826b2-cebf-40da-abbd-3c373cfd3302.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Karaoke Opera: Sixteen Favourite Arias and Duets
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 0x1b945203c44356cfe648c88d9aca2acac6fa5589ed8002ebf0cbe78aa23f2eb8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEA580600598.
The Most Famous Melodies in Classical Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79014d02be1d223cefa271cc3fc7312464c211f17935369eb299f069bf3a4718. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USX761001801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275ae2fbcd3faa76bd3526c6bd95980f9f7671688a4a16014229720670d14f33. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USX761001807.
Württembergisches Kammerorchester Heilbronn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d149eb9d6d1aa9c8ebc82b44da39891fddb70120a3babc6548706687493cade. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USX761001842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b62778b6a8cae8b22d3755a35a39eadeb8555062df347a8b177791ad6ddcc9. 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/USX761001845.
Uplifting Classical - Music to energize your mood
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83360b3ea1cee35597740ddb8fa161dce6de44c43ff630682554f8c6398a4ac. 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/USX760500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83bda261b37726c8c9263857715090782782fe6b7584c8c0a6ef79ffa1bc1d5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USX760500073.
L'Elisir d'Amore: Act II - "Una furtiva lagrima"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5b85976e49160cc0fe3bf10b66061cd2f2224f7a2843dd7f5b903a6101933a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USZDG0601347.
Italian Librettist, Francesco Maria Piave: Operatic Works of Verdi
Variations on "Twinkle, Twinkle, Little Star"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21df359d23c3f58760ee5ece105aea838046cfb452d87b692b959ce87878dc51. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USX761001725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2561971dc5a6c1c0d7e869b9963c9229a99a603b663c410fa5ab545061ba04e3. 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/USX761714026.
111 Classical Masterpieces from the Movies
Classical Music in the Movies - Famous Film Scenes We All Love
Classical Masterworks - 100 World's Greatest Classics - The Finest Classical Music In The World
The Beautiful Blue Danube, Waltz, Op. 314
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523ace05c5b2093d2435bdfba6420cf10dbacf7a9f454727a58ed217c3bb2af1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CAM460770127.
Classical Music Featured In James Bond Films
Wine, Women and Song ("Wein, Weib und Gesang"), Waltz, Op. 333
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535cc39fce42691fdd80bf49ba5422a61c8e67c554c84034e998943ee54cc36b. 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/DEA580800340.
The Four Seasons, Autumn, Op. 8/3: III. Allegro (La caccia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e96a1670c1bdab22b1a6120b01e8102c62ff328b2cc3df2a0b2d9580bc9dd87. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEA580600118.
Fifty Shades of Opera - 50 Sensual Arias
World’s Greatest Classical - 50 Classics - The Only Classical Album You’ll Ever Need
Music For Wine Lovers (Vintage Classics)
Oriental Garden - the Romance of the East in Music