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 0x658c735f98806630d6cfb929d5eca0a20dda78c666ebe39335dc3535adacf134. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0acfc59d-9eb1-444d-9748-74d0782ceb16.json and https://artists.proofprofile.net/proofs/artist/0acfc59d-9eb1-444d-9748-74d0782ceb16.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Zauberflöte, K. 620, Teil I: 1. Auftritt. Nr. 1 Introduktion. Aria: "Zu Hilfe! Zu Hilfe!" (Tamino, die drei Damen)
Mozart: Die Zauberflöte ((The Magic Flute): Famous Scenes
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 0x5f42f698696252993d235f3841822a0571c70a749d9f86a8ed647af3640a906a. 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/FRZ140932021.
Die Zauberflöte, K. 620, Teil I: No. 1, Introduction "Zu Hilfe: Zu Hilfe!" (Tamino)
Mozart: Die Zauberflöte (The Magic Flute)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f883d9a23d752a667ff5246847b9d59a6a1cb64b76e9f515b115128750f65c6. 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/FRZ140932020.
Die Zauberflöte, K. 620, Teil I: No. 2, "He da!" (Tamino) - Auftritt (Die drei Damen, Papageno, Tamino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae04483460edc2417eff4a3884639abe458aa2e6fe16eebe9fcfe26149c31eb. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FRZ140932040.
Die Zauberflöte, K. 620, Teil I: No. 3, Auftritt (Die drei Damen, Papageno, Tamino) - "Rüste dich mit Mut und Standhaftigkeit" (Erste Dame)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664caf33d7573a696ac304df12f3635729dcc628e341726f3e8cfb1638bb8540. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FRZ140932060.
Die Zauberflöte, K. 620, Teil I: No. 4, Auftritt - No. 5, Quintett "Hm! Hm! Hm!" (Papageno) - Auftritt (Die drei Damen, Papageno, Tamino) - "Die Königin begnadigt dich" (Erste Dame)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8f934ec7b2cc368b54316e7fb168ff36ea85c643af9526a4054296b93cde35. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FRZ140932080.
Die Zauberflöte, K. 620, Teil II: No. 11, Auftritt (Die drei Damen, Papageno, Tamino) - No. 12, Quintett "Wie? Wie? Wie?" (Die drei Damen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1230c79d0e38482a7874f32f01bcd99e0c8775da83e4cf3c0508f1313e9312. 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/FRZ140933060.
Die Zauberflöte, K. 620, Teil II: No. 15, Auftritt (Sprecher, Zweiter Priester) - Auftritt (Tamino, Papageno) - Auftritt (Papageno, Weib)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3937d9b97af8dad460e44ebadcf842f9d2a55c6775d0ec97ad2fb85d4c9936ca. 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/FRZ140933140.