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 0xdb3337dfbcd592b238fd7f1c4d57f53b27afb804fc519bd0460d4ab79d276cbb. 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/bf540c06-8efd-4351-8cf3-2d688cd4f6f9.json and https://artists.proofprofile.net/proofs/artist/bf540c06-8efd-4351-8cf3-2d688cd4f6f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto in C Minor, Wq. 5: III. Allegro spirituoso
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 0x354511b170eb2fc6511c0f23c6f5e9e06dfb8368901fdc48a9dfa8f539426a48. 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/DEAD62203903.
Concerto in A Major, Wq. 8: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505a7042111fbe8bc4c74931fb0fc36cae27316ab77f39b083245c09e23b8181. 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/DEAD62203906.
Concerto in C Minor, Wq. 5: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dac85818549399fac01377e225249c0792a4b83596505c1f3a210fa6090fbc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEAD62203901.
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 0xfb40c67a343711e3f821df5802cf8a9b1439443a9a322363dcd3afba5bb6c837. 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/DEAD62203902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8d4f09297e845c59812e9eae06ccf97bea81dde7b3a02540e602155854a713. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEAD62203904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6de6e6c67a08a7a6e3837b14e7bbd8059e69c5ca3ecc535e34f3280ccb3034. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEAD62203905.
Concerto in B Minor, Wq. 30: I. Allegro di molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb9d6de70ffe4a947a0329737b4ce730ab63500f0efb6aa2bc6394590577a5a. 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/DEAD62203907.
Concerto in B Minor, Wq. 30: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a519cf250bc78a597468fb13b8490b4802b443a448814acce15d7b31dad813. 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/DEAD62203909.
Keyboard Concerto in A Minor, Wq. 1, H. 403: I. Allegro (Cadenza by M. Rische)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1797061394cf29552ecbce9652bacd904f09da50bd860b577e648a0473cf5ef8. 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/DEAD61703401.
Keyboard Concerto in A Minor, Wq. 1, H. 403: II. Andante (Cadenza by M. Rische)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06a333a49c7048eaedcd8c793b9bf2aa96f10a3065ee933a6ebbf48dc9814db. 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/DEAD61703402.
Keyboard Concerto in D Major, Wq. 45, H. 478: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826b6a9fd5ec62101558c2bc909c2977d818128bb6418078784776261734eaea. 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/DEAD61703406.
Keyboard Concerto in E Minor, Wq. 15, H. 418: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b50231c0772357b06fb107c4cdca6d6a36aef416e6d1e808d7694c4c7b5576. 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/DEAD61703408.
Keyboard Concerto in A Minor, Wq. 1, H. 403: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f947d2488b5c25b14216be24296a98f27cb1fd9f7418fb0a25bb2c9a13fced. 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/DEAD61703403.
Keyboard Concerto in D Major, Wq. 45, H. 478: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31bc216a9d29e1f6afd6bc3d429153f4e675081a106fadf68140d74a9b18493. 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/DEAD61703404.
Keyboard Concerto in D Major, Wq. 45, H. 478: II. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6edc220c1102963ba148cc416105244ea63d2fe4d8600013dc4aea8307faa2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEAD61703405.
Keyboard Concerto in E Minor, Wq. 15, H. 418: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc257ce9008d01b20dbcdcddad57ce9fa52bb434c4783499992e3ff3abb557b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEAD61703407.
Keyboard Concerto in E Minor, Wq. 15, H. 418: III. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2938fc1b2ab5864762ac494d4fafd5d0caa24d54ea9847c5a7288b792eeca2e2. 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/DEAD61703409.