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 0xe0f17feb34366f22b262139116af37dfb399981f9ed8a31d578338f431e9fe6f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e8580c6-1674-44ed-bf4e-efa31d8166e7.json and https://artists.proofprofile.net/proofs/artist/9e8580c6-1674-44ed-bf4e-efa31d8166e7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
From the House of the Dead, JW I/11, Act I: Moderato I - Live at Grosses Festspielhaus, Salzburg , 1992
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 0xb77036c42aa776b6b862a1d5bb815c00668b91bbf41df3dd373a7c87c4db44fb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF059232502.
From the House of the Dead, JW I/11, Act I: Přivedou dnes pána! - Live at Grosses Festspielhaus, Salzburg , 1992
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114b8c45ed4ed85141d40e3ee193ed0f5a1ad741618e029662cdea53d1d78278. 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/DEF059232503.
From the House of the Dead, JW I/11, Act I: Aljejo, podávej nitku! - Live at Grosses Festspielhaus, Salzburg , 1992
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95522ace6a689ff3aa3100d30171e2cc1e6551109aa0320346679b37606f5268. 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/DEF059232505.
From the House of the Dead, JW I/11, Act II: Mil´y, mil´y, Aljejo! - Live at Grosses Festspielhaus, Salzburg , 1992
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b10746c97aac3fac3179b34d4b57e4f10b5bd220a75dc2f1baa11d86c9a9a2e. 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/DEF059232507.
From the House of the Dead, JW I/11, Act II: Skuratov. Poslali mne v Jurjea - Live at Grosses Festspielhaus, Salzburg , 1992
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641e91afab6185de6d3eba8b59e1ad8c5155a04502876472d93784fd4c33dc92. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF059232508.
Die Entführung aus dem Serail, K. 384: Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b36937f236a9e00d71df8bb3ef9f8bb958a742b1a8fac7f6d0e44d81179f74. 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/USSM10107462.
Die Entführung aus dem Serail, K. 384: Nr. 11 Arie: Martern aller Arten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5adb444b306832b7fd664d67fe39875012cb69c783a720f44e011ad5967fa5a. 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/USSM10107480.
Die Entführung aus dem Serail, K. 384: Nr. 12 Arie: Welche Wonne, welche Lust
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905fa475b5d535d77409327546b39bd77a1ccfdee77e249422ad5062c04da7f9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSM10107482.
Die Entführung aus dem Serail, K. 384: Nr. 21b Chor: Bassa Selim lebe lange!
Konzertvereinigung Wiener Staatsopernchor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad5e429596d104363b6843996c4074a0d04b8939e3893a83b497af8534c2b64. 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/USSM10107499.
Die Entführung aus dem Serail, K. 384: Nr. 2 Lied und Duett: Wer ein Liebchen hat gefunden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c58c4fde097c1bace3b8b3e2227d8b1af7e969e5dbfaa49f6ebd371845529d4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSM10107464.
Die Entführung aus dem Serail, K. 384: Nr. 5b Chor: Singt dem grossen Bassa Lieder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff5cefe241ef4bfe0d66141e52a18bf4488bbb4b431ca0202aef375ae035ba7. 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/USSM10107469.
Die Entführung aus dem Serail, K. 384: Nr. 3 Arie: Solche hergelauf'ne Laffen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c35d0ce91d25e49e6aef6af53471799cdaaface4dab178dff5346ed9b0f677. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSM10107466.
Die Entführung aus dem Serail, K. 384: Dialog: Geh'nur, verwünschter Aufpasser
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96581b01fe087f2bfe3afdfdb6e1ce81d82f78c524e603f5d71c06f1fb62bbc5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSM10107467.
Die Entführung aus dem Serail, K. 384: Nr. 8 Arie: Durch Zärtlichkeit und Schmeicheln
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc175c737dbec2c0e8d49b6d51537b617c3a0adc80648f4bff3b549026409505. 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/USSM10107475.
Die Entführung aus dem Serail, K. 384: Nr. 10 Rezitativ und Arie: Welcher Wechsel herrscht in meiner Seele...Traurigkeit ward mir zum Lose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd033fbcee1f141ce6f2bbc83a37d50d97b75ff194560e47dd76eaf20de9067d1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSM10107478.
Die Entführung aus dem Serail, K. 384: Act I: Nr. 1 Aria: Hier soll ich dich denn sehen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5922ebae2b5c097663097747af91b48797a80bcdbc6d06692367ec07d4476d85. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USSM10107463.
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
Die Entführung aus dem Serail, K. 384: Dialog: Nun, Osmin, wie steht's?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0d0e2c67d7d5bd642f5c57c3daf41d085ec452f0bc09d186f5c70af942e0e4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USSM10107465.
Die Entführung aus dem Serail, K. 384: Nr. 4 Rezitativ und Arie: Konstanze! dich wiederzusehen!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c74a3596cd989919a941ee0e5b579cd2d7a84146a9517bbf829d9d8b20c2a7. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USSM10107468.
Die Entführung aus dem Serail, K. 384: Nr. 6 Arie: Ach, ich liebte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98d4cb60ac74122f2d6265eb678cfe375b2e8614dcf632cb023ea61bdc1a5a7. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/USSM10107471.
Die Entführung aus dem Serail, K. 384: Nr. 7 Terzett: Marsch! marsch! marsch!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde54c63c69fbf9058ca657d6227c07b7206f3f68b1f53d1ca1c2f53ff58f90a6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USSM10107473.