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 0x29b65c90551f169a434ce7e9a0071b0545adbbda411b6fb0d497853359a143ac. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee9e78d7-fa95-4676-8f3c-654b06de2802.json and https://artists.proofprofile.net/proofs/artist/ee9e78d7-fa95-4676-8f3c-654b06de2802.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony No. 4 in B Minor (Reconstructed by S. Malzew): I. Allegro appassionato
Mayer: Symphony No. 4, Piano Concerto, String Quartet & Piano Sonata
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 0xc242b66d87328a295ba4d601235b74c34e8d159b3dcfc8b697f31964b40ff0e9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEB261800411.
Symphony No. 4 in B Minor (Reconstructed by S. Malzew): II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7772c8d961774be9e266020ddaf2a676c35e5ef32e94b3a58b75aebdb20882. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEB261800412.
Symphony No. 4 in B Minor (Reconstructed by S. Malzew): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdcecf58e976102e72174eb6ccbd720aef7af4f75b682627ef21754b22521d5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEB261800413.
Piano Concerto in B-Flat Major: I. (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c2f21d59e54575ef8d96c8b6c057218997131cf8433b0eb9d69a3ca813763c. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/DEB261800415.
Piano Concerto in B-Flat Major: II. Un poco adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99af8dcafab17c0229eaab24804dce7c451956047865ea4aa8643ad61cb06aa2. 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/DEB261800416.
Piano Concerto in B-Flat Major: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8b6af7b1268be5fc302f6adf20f8047698ace722c077faa38275e8e2a554f1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEB261800417.