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 0x28c6db655415281b947be5d7867706bc472cd176b755ea1d413ad17dfc6c3799. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52fe6050-3cf2-4b5d-9c1e-94b291f87ab4.json and https://artists.proofprofile.net/proofs/artist/52fe6050-3cf2-4b5d-9c1e-94b291f87ab4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Der Freischütz, Op. 77, Act 1 Scene 4: Dialog "Was ist hier los?" (Kuno, Kilian, Max, Samiels Stimme, Kaspar)
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 0x37eee50520064ae21e6b84faf711473308c36e3e75dca636452eccf68de5b104. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FR7JM2157070.
Der Freischütz, Op. 77, Act 1 Scene 4: Romanze "Herr Ottokar jagte durch Heis und durch Wald" (Kuno) & Dialog
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391990c86cb9e04dd96fd5bed90ca0b5b7bf17c3015e3b44539f11546d5d02f4. 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/FR7JM2157080.
Der Freischütz, Op. 77, Act 1 Scene 6: Rezitativ "Nein, länger trag' ich" & Aria "Durch die Wälder, durch die Auen" (Max, Samiels Stimme)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0204564baa21a72241011203d0f368565e4462ac86211d0e8009edf40d23352d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR7JM2157110.
Der Freischütz, Op. 77, Act 1 Scene 7: Dialog & Nr. 4, Lied "Hier im ird'schen Jammertal" (Kaspar, Samiels Stimme, Max)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20877a0111da28c5a1b1012471fdfe42ad076f9bb07838abc8fb1540cf35158d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR7JM2157120.
Der Freischütz, Op. 77, Act 1 Scene 7: Dialog "Agathe hat recht" (Max, Kaspar, Samiels Stimme)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb1813954aac17b3653bee364dfafcc9ddabce81d0bdccb59e53ec72246b032. 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/FR7JM2157130.
Der Freischütz, Op. 77, Act 2 Scene 4: Dialog (Samiels Stimme) & Nr. 10, "Milch des Mondes fiel auf's Kraut" (Chor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8796e9630610088fcc576ab50b254c32db7a5ebf0cac1f09308404c9f71d95bb. 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/FR7JM2158010.
Der Freischütz, Op. 77, Act 2 Scene 8: Ah! Zische, brause, koche auf (Samiel, Kaspar, Chor, Max)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961fc0d01028a5b950e1dd1ef5480a72535c1e1e557d4191568abd3c19e83a18. 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/FR7JM2158050.