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 0x48169f56ac6dd9768b83bbe4688d21726c58d0235b31c26372138c885b60d567. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ac4f173-23ae-4437-a229-a1659124bbf6.json and https://artists.proofprofile.net/proofs/artist/1ac4f173-23ae-4437-a229-a1659124bbf6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Joachim Raff: Welt-Ende · Gericht · Neue Welt
Franz Schubert: Winterreise, Op. 89 (Version for Baritone, Choir and Piano)
Jahresbilder: Pictures Through a Year (Choir, Art Songs and Piano Works Arranged for Choir and Chamber Ensemble)
Hiller: Die Zerstörung Jerusalems, Op. 24
Mendelssohn, Felix: Wer Nur Den Lieben Gott Lasst Walten / Kyrie in C Minor / Sinfonia No. 3
Wer nur den Lieben Gott lasst walten (Choral)
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 0x09ef1043d04b5517a3a89db14e20194ee82140bba6f5bcf36dd435871de78deb. 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/DET900811802.
Wer nur den lieben Gott lasst walten: Sing, bet und geh auf Gottes Wegen (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7e0b09884c1bb562b8ede2b3124717aa6d2c3b9a9d94cfd871ca95fdd791e1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:54:46Z), 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/DET900811804.
Symphony No. 2 "Resurrection" (1895 Version): IV. Urlicht
Nocturnes, Op. 9: No. 2 in E-Flat Major. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbd27ecf429cbf6f50dfeed8d2c67914cfd740ad07a6022e7ef173a9108ce4a. 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/GBAYC1601716.
Tugend Und Untugend: German Music From the Time of Luther
Tsat een meskin: Stat ('tsaat) ein meskin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d24e282a1d86a1c1d0994a0d30e529d1368bf253edefbb0e0e1e81a6887b959. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKI199531102.
Johann Rosenmüller: Dixit Dominus · Sacred Concertos