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 0x7b04ba6db7600aeb2847c9ff165ed0d3a26758fc612eda6bf2dc934ab1c8b7ff. 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/770e282e-2a57-4daa-93eb-b5a1b7e6f321.json and https://artists.proofprofile.net/proofs/artist/770e282e-2a57-4daa-93eb-b5a1b7e6f321.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Entführung aus dem Serail, K. 384, Act I Scene 1: No. 1, Arie "Hier soll ich dich denn sehen" (Belmonte)
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 0xde36fa1ba9bfa1adf2c2d8f9c6b44b97b73111c3f5131caa989f9c77916a5c5a. 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/FRZ141423020.
Die Entführung aus dem Serail, K. 384, Act I Scene 2: No. 2, Lied und Duett "Wer ein Liebchen hat gefunden" (Osmin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da8694111b026a3f7174827ca6f0e7de2c0f5667107e147f5ce5e259e702824. 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/FRZ141423030.
Die Entführung aus dem Serail, K. 384, Act I Scene 6: No. 5a, Türkischer Marsch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13dfc93e70244992baaa98ded53cf63bc3eb49f57afc240d220814f11d56750. 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/FRZ141423080.
Die Entführung aus dem Serail, K. 384, Act I Scene 7: "Kummer! Immer nur Kummer!" (Bassa Selim, Pedrillo, Belmonte, Osmin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafce3ac425f4f93ad60d09fdd35a95d1fe117355e6a19a07ebe6a5f2515d0a8. 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/FRZ141423120.
Die Entführung aus dem Serail, K. 384, Act II Scene 1: "Ei, seht doch mal" (Osmin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f906c6adede3391ab0b72e5bb93d5c4e1c44a576258bb4b3f578150298e56c6. 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/FRZ141423160.
Die Entführung aus dem Serail, K. 384, Act II Scene 2: No. 10, Arie "Traurigkeit ward mir zum Lose" (Konstanze)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c733014d7ef6f16118e492bb642c887add78f21dcb3d4234917908f37c150d. 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/FRZ141423200.
Die Entführung aus dem Serail, K. 384: Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10285621d287ef922f745f9d4d36cf155e6e267eee5039460e71454b6e6c7723. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/FRZ141423010.
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, Act I Scene 3: "Ich kann doch nicht noch so einen Schurken" (Osmin, Pedrillo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf049e9dc50559811c2cb54d263894d4d58f6239af23517372634ab95257c25. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FRZ141423040.
Die Entführung aus dem Serail, K. 384, Act I Scene 3: No. 3, Arie "Solche hergelaufne Laffen" (Osmin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5973ce51d4ad24bb34d6698d27b728231884bdf0005f7f9ca0dcb1a7c6fb2f73. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FRZ141423050.
Die Entführung aus dem Serail, K. 384, Act I Scene 4: "Hau bloss ab, verwünschter Aufpasser!" (Pedrillo, Belmonte)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38452f226d960b3aa130ddfdc97ff63d1b15f1111af724ed54356a24f2ad3156. 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/FRZ141423060.
Die Entführung aus dem Serail, K. 384, Act I Scene 5: No. 4, Arie "Konstanze! dich wiederzusehen!" (Pedrillo, Belmonte)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd404c94616acb2b08ae02e41d0b088b98616c259fa368d9b08bfef3dc6e200. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRZ141423070.
Die Entführung aus dem Serail, K. 384, Act I Scene 6: No. 5b, "Singt dem grossen Bassa Lieder" (Chor der Janitscharen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f70786908744eebe0affe20d5d737d46f3de4578df72c9b957c6bb09a76ad9. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FRZ141423090.
Die Entführung aus dem Serail, K. 384, Act I Scene 7: "Immer noch traurig, geliebte Konstanze?" (Bassa Selim, Konstanze)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb65f693c0170d72ceea7c03907009d26f46fcb1e27f81bd2abb8aefeab2d7d0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRZ141423100.
Die Entführung aus dem Serail, K. 384, Act I Scene 7: No. 6, Arie "Ach, ich liebte, war so glücklich" (Konstanze)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b23985e8eda3b2bfc305f6649289ec19ffedb708a8cd25d80b1fcab3cf85264. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/FRZ141423110.
Die Entführung aus dem Serail, K. 384, Act I Scene 10: No. 7, Terzett "Marsch! Marsch! Marsch!" (Osmin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe765e3b07cf31483640c466e2295cf90118049ffc69584c0db12af2b50d6c39d. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/FRZ141423130.
Die Entführung aus dem Serail, K. 384, Act II Scene 1: "Wer zum Teufel hat dir das Zeug in den Kopf gesetzt?" (Osmin, Blonde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eabb2e281f1712de760aed2ff290a63f49344463f02ca219062d330b0d74570. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRZ141423140.
Die Entführung aus dem Serail, K. 384, Act II Scene 1: No. 8, Arie "Durch Zärtlichkeit und Schmeicheln" (Blonde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f23dd14f2f4be8bbae122c8834301fff2b12668cd5cf27e58046fa1dae5360. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FRZ141423150.
Die Entführung aus dem Serail, K. 384, Act II Scene 1: No. 9, Duett "Ich gehe, doch rate ich dir" (Osmin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78da37f4349d6af3fadf6e98adb542d060aeca9bf1c498228080101be0373215. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRZ141423170.
Die Entführung aus dem Serail, K. 384, Act II Scene 2: "Da ist Konstanze" (Blonde, Konstanze)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffa0ffc96cde87e37024bf280720e2f25cc4d3db1d9fd6dd31986fb96c50a67. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FRZ141423180.
Die Entführung aus dem Serail, K. 384, Act II Scene 2: "Welcher Wechsel herrscht in meiner Seele" (Konstanze)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876c8c131c8d554e3b9b9968f5d7bf29ed959b155a7803aa9dc0b37e626a9121. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FRZ141423190.