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 0x1f803be5d17bbeb45e087b0cecdcbafeb87807c55986040c55b37d4868d49c92. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f72233f2-bb50-4272-be34-6332800e43e8.json and https://artists.proofprofile.net/proofs/artist/f72233f2-bb50-4272-be34-6332800e43e8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chopin: Etudes Op. 10; Scriabin: Late Works Opp. 70-74; Stockhausen: Klavierstück IX
Schumann: Carnaval - Brahms: Klavierstücke op. 119 - Schoenberg: Klavierstücke opp. 11, 19, 23
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 0x1dbbd35534c4dca818f9b8953f1d4fd2b0fa25e9751e9209acf9e3ed2e97d559. 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/ITUM71800095.
6 Moments musicaux, D. 780: No. 1 in C Major. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954b577aeb02479eca7679769b1a6ea61f6d97c8673634db618661cea8621456. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEN962401461.
6 Moments musicaux, D. 780: No. 2 in A-Flat Major. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99db82a9822f5135d446cc29206d7ebdee4dde6aa75c10c69f9084a9f5df76d7. 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/DEN962401462.
6 Moments musicaux, D. 780: No. 3 in F Minor. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319cc93e43c8240fe756e0a2114332b955887439f9f5a11de24eb679fe76954c. 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/DEN962401463.
6 Moments musicaux, D. 780: No. 4 in C-Sharp Minor. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197562a9f03f8535daca793c90adf22b75dab28005f8539174fd54103d5ff3d1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEN962401464.
6 Moments musicaux, D. 780: No. 6 in A-Flat Major. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc112cc1642be4d648bd434d62ca4d5562a5a1d46aef6abcd619616eb44ab7ca. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/DEN962401466.
Fantasy for Piano 4 Hands in F Minor, D. 940: I. Allegro molto moderato –
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b0d3a349f48f13ec69c4fdb1aefc87a0d9cbbed437bc79c50897b11cc89da4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEN962401471.
Fantasy for Piano 4 Hands in F Minor, D. 940: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fee6b2c4843ce81c7c924f160c3545930270d3fef562e06192ea97a856d61ff. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEN962401472.
Fantasy for Piano 4 Hands in F Minor, D. 940: III. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed99f0a6b4e0d155af0238df9ddba5ed0f068c255b64b6484646873bcf6bdfb4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEN962401473.
Fantasy for Piano 4 Hands in F Minor, D. 940: IV. Tempo I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53bf0eb6316c3cf5e1961b97b4a75e811321608995cd69ee37c3a75a94fbdf0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEN962401474.
En blanc et noir, L. 134: III. Scherzando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1091abb98f4186e8c71dd72ba9d6c311cc54c1752bf2c321cdc13efb6f4e8448. 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/DEN961601183.
6 Moments musicaux, D. 780: No. 5 in F Minor. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90f48aba8deebbe997fb41f1321437e8b84443d0de270549c374c8f6a26a874. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEN962401465.
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
En blanc et noir, L. 134: I. Avec emportement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892e794718230b35832c7d1ce441324e6f658b999b7dcf79096e532cb9cd4256. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEN961601181.
En blanc et noir, L. 134: II. Lent. Sombre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc81ffb6d57bfc9c86d6b59189e036116a557a483b5b5a85733fa32f0ba4b176. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEN961601182.