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 0x7ef08c4bd41a6ecfe71c6dde5bc3655d12f48e0392ffe8cc7b98102d749515e5. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/975693d0-40cc-45d9-960a-2b70a19d7372.json and https://artists.proofprofile.net/proofs/artist/975693d0-40cc-45d9-960a-2b70a19d7372.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nicht mal der Himmel ist so blau wie Deine Augen (Discofox - Mix)
Wie ein Engel mit zerbrochenen Flügeln (Discofox-Mix)
Caro Mio (Hübner Matschke "HÜMA" DJ Mix)
Ja wenn wir alle Englein wären (Ententanz)
Wie ein Engel mit zerbrochenen Flügeln (Hübner Matschke "HÜMA" DJ Mix)
Wie ein Engel mit zerbrochenen Flügeln (Hype Mix)
Ein toller Typ aus Entlebuch (Ski Dance Mix)
Ein toller Typ aus Österreich (Ski Dance Mix)
Apres Ski Hits 2018 Party - Die XXL Schlager Discofox Fete (Feiern in der Karneval und Fasching Fox Hütte bis 2019)
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 0x20998359affbb7ba40e70beb0de1db390b4222e747f060de05b409df4a6bf541. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEZ521700290.