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 0xc25724566b9d46b3556120ffec69ac3e47b4e8fcbc68ef8499d5f21080cc1333. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ef9b031-e644-44a6-83c2-e445334e6577.json and https://artists.proofprofile.net/proofs/artist/3ef9b031-e644-44a6-83c2-e445334e6577.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Zauberflöte, K. 620, Act I: No. 8, Finale: a-c. Zum Ziele führt dich diese Bahn
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 0x75f1fefabd06d81a3d9382a52e857cf737ba3c90172571d14f13ee0c64ef777b. 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/DEN960532513.
Die Zauberflöte, K. 620, Act II: No. 21, Finale: f-g. Papagena! Weibchen! Täubchen! - Pa-Pa-Pa-Pa-Pa-Pa-Papagena!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584493ebfeedc532b484675f312213030cefb66e6d5f3a3988ff9a834c172160. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEN960532541.
Die Zauberflöte, K. 620, Act II: No. 21, Finale: a-b. Bald prangt - Du also bist mein Bräutigam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696b1bc0d238ca9819f54ff709681c4496003fafdd53a94c6846b4d4d92e350e. 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/DEN960532539.
Die Zauberflöte, K. 620, Act II: No. 16, Seid uns zum zweiten Mal willkommen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80c2c6e48ac24dbb1cafe4912ded1a8b6ced2e94c88862d04fcaacacba4f5e7. 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/DEN960532529.