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 0xb46af36b6e38a60dd2fb3942bf958ec0dbb2fd288bceb87d3ded23e565760a13. 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/4bb83d8a-d6cb-449c-a954-2964f96ab764.json and https://artists.proofprofile.net/proofs/artist/4bb83d8a-d6cb-449c-a954-2964f96ab764.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Blackest Bass: Gottlob Frick Portrait
Die Entführung aus dem Serail, K. 384: Wer ein Liebchen hat gefunden
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 0xeddb3a89cdf90308656b4f16a8dd65c716ede776ca0e8a2ec2ec31a831fe11be. 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/DEAD61804701.
Classical Masterpieces of the Millennium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7905e6a3ab555967d056e41e744ffe61a5237572e85e357f67e01119616da2f3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US5541304492.
Lebendige Vergangenheit - Lorenz Fehenberger
Die Walküre, WWV 86B, Act III: Ride of the Valkyries
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10ca4b4b90afad497e064ed934a362c752ac798717893d45381ddc7335cdd32. 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/GBAYC9100962.
Die Zauberflöte, K. 620, Act I: Der Vogelfänger bin ich ja (Papageno)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8029731bc22a5b597b46303e7197c921d84c0968fc11dc723ae94e13ed4675. 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/GBAYC8100084.
Die Zauberflöte, K. 620, Act II: Pa-pa-gena! ... Pa-pa-geno! (Papageno, Papagena)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d3adfc67698ea5c409cc3316da2a32115d5dc608b0f8007721864f4ff03d62. 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/GBAYC8100333.
Die Zauberflöte, K. 620, Act II: Der Hölle Rache (Königin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9a9d07c43c9a816fba793b0176a11931b67f991e5620711c21a65bf3b7f079. 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/GBAYC8100313.
Die Zauberflöte, K. 620, Act II: Ein Mädchen oder Weibchen (Papageno)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc418a6227eccf3415cb03c38c535bd3d27996b901dadcb5c7f4065ea94b9ff0. 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/GBAYC8100325.
La Wally, Act I: Ebben? ne andrò lontana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2450b0e18ecdaac54b36939f453510ee60640eafae2c93d22c5300293929f103. 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/GBAYC8600264.
Il Barbiere di Siviglia, Act I: Largo al factotum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d2904eef1916755182c044837c81b120b816c847befa36b051958983104ef0. 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/GBAYC9600384.
Il Barbiere di Siviglia, Act I: La ran la le ra la ran la la ... Largo al factotum (Figaro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfe6b9b246a1556afc90916525c54181730188373fb5e2e1516ff7cb6d02c7d. 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/GBAYC9601607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747dc04a59e61a36947d648d075b163abe47db593bcc48811513b6c79f6f277a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBAYC8100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb7a9b469fedd19c1f7d74041f10e40671401397aeba1d7a1122e16f826fb73. 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/GBAYC0500564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca56f18c1d57110dbf01a0791d595f64b33803680f4c45ee2357860b51510ee. 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/ITD001100375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a18fc6ca5ef4c1219827be4ba0de7965d5d8f8fb48be8a78c4047bcd090407d. 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/GBAYC9101241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd397305b0cd6002790a591ac9ba006556cb9611599b1e00c8952304d2f4af9f4. 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/FRZ119000250.
Così fan tutte, K. 588, Act I: Un'aura amorosa (Ferrando)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b33b2a765bcdbb2411ecac44ce7669da6dd3d6b5b2843d2bba4418f604e9d4. 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/GBAYC0001068.
Concierto de Aranjuez: II. En Aranjuez con tu amor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57e2df8986e849f3958ce6986717d545267ed0b3aaa79fbc10cdb32b1fb193b. 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/FRZ209505300.
Messe à trois voix, Op. 12: V. Panis angelicus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f4cea7801c7cda85419df1d4fd1d18fbc89075f2993a1117b21eec372e9bf1. 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/FRZ209505900.
La traviata, Act I: Libiamo ne' lieti calici (Alfredo, Violetta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3387b1a1a89472ae46c26568a52dec7b58ca4ea07b54cc15f7346c9e39de05. 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/GBAYC8000072.
Orchestre Du Theatre National De L'Opera Comique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9a1c14a3aa2b276a06b0a3b8aabeb50867d70ffbd7b087186843a245520391. 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/FRZ118701170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc383b9639a4ce3462198799260eabb5649eb7fc58238390d4b6cebc91851fc6d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBAYC9502536.
Aida, Act II: Triumphal Chorus - Grand March "Gloria all'Egitto"
Chorus of the Royal Opera House, Covent Garden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa895e4ee975d2aa136919af28dc56066001a69a1935032f4c1fc236d7672a207. 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/GBAYC8600707.
Dokumente einer Sängerkarriere - Leonie Rysanek
Lebendige Vergangenheit - Margarete Klose (Vol.2)
Jägerchor / Hunting Chorus - Große Opernchöre / Best-Loved Opera Choruses
Was gleicht wohl auf Erden dem Jägervergnügen (Der Freischütz: Jägerchor, 3.Akt) - 1990 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ace6ef70d02a91fa97d502fd53f73c4f3bbc21fb391c92fd36ced700dde070d. 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/DEA340702104.
Wagner: Tannhäuser, Act 3: "Beglückt darf nun dich, o Heimat" (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb722d1070a8e0e03c472cc0d405de450c2ddb3fab814def41efae23abb1ce394. 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/DEA340702113.
Wagner: Lohengrin, WWV 75, Act 3 Scene 1: "Treulich geführt ziehet dahin" (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c2129bb50fdbd3a423015fe20b2c8a55b1e7b8b6e0a67b80f7bf25b50b2a0d. 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/DEA340702109.
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
Freude schöner Götterfunken - Best of Beethoven
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4af2d39b4fb4b1c6caad9f8b1ecea46b2724f0e7dfe9326799858c29e51a030. 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/GBAYD8800169.
Richard Wagner, Giuseppe Verdi: Viva - Coro Dell' Opera Vol. 3