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 0xa7b126c28124dea54c5bcd1e7b1c496d180b9a59c15583fe44d55dd45643dd97. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e81073b-b6c6-49d4-88b3-b03daae2224f.json and https://artists.proofprofile.net/proofs/artist/4e81073b-b6c6-49d4-88b3-b03daae2224f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x6f2e4492f9b858aacf51b69ff19c8506a10f40e58428b34261e8cb387ad1e0f5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEF058401720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4168389d62ade00bdf6a26296c0e9d9d767a1fca592b7f4d938a2d2d667160ca. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEF058230601.
Nabucco / Act I: Gli arredi festivi giù cadano infranti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604070433eedc6d178719916d90e4861cd1198d4eae5b54fe5b79b047078f8cc. 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/DEF058230602.
Nabucco / Act 1: Recitativo e terzettino: "Fenena! O mia diletta" - "Guerrieri, è preso il Tempio..." - "Io t'amava"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3911cf3b0ace12dfba03b519b3ad1c2af7760251a582cc3d4025cd04acaf21. 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/DEF058230604.
Nabucco / Act 2: Chi s'avanza?/Salgo già del trono aurato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578b0e6d636277520007804c8258507a6613bdc14be8485c808f7352b6b37833. 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/DEF058230608.
Nabucco / Act II: Che si vuol? / Il maledetto non ha fratelli
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f1b5f57d3ae7f1eb9bbe5ac890b00d3ccdb5bc2d798372957acf7ca7611960. 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/DEF058230610.
Nabucco / Act 3: "Ah qual suon!"/"Deh, perdona"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38c444b09ae9155cf73260f830e941b2ad3f564c8c288ea7f70984052d6b936. 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/DEF058230614.
Nabucco / Act 3: Va pensiero, sull'ali dorate
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779130f53d03f8b9b46b3f05d4f6e92cfa33843012d82d6d40d05592fa538d9d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEF058230615.
Nabucco / Act 2: "S'appressan gl'istanti" - "S'oda or me!" - " Chi mi toglie il regio scettro?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f92e29dfcc0737a4da83436479a96617f2cc71a4f75aaf1278180bd36d5c14e. 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/DEF058230611.
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
Nabucco / Act 4: "Dio di Giuda!"/"Cadran, cadranno i perfidi.."
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d2911e8db421176856993db420adbe95fe3f722f3ca81e85c5b10544ea0ed6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEF058230619.
Symphony No. 35 in D Major, K. 385 "Haffner": I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b76522c2ce178cc6f6aa7b7e863dac8c9991bf6fc774e125ac9cb914ad91cc. 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/DEF054202041.
Symphony No. 40 in G Minor, K. 550 (1st Version, No Clarinets): I. Molto allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04ebfe5f4b8e1b98dc59149dad4da73ddfba2d233f6c12a16967a8120f3a260. 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/DEF054202051.
Symphony No. 40 in G Minor, K. 550 (1st Version, No Clarinets): II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd0373d25a020491e11b87b729f94c32e1762ddfb67023f030d434120c1323b. 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/DEF054202052.
Symphony No. 29 in A Major, K. 201: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8522e84ce702f62f2893197666045115901e571649d782570c872ce06260bc7d. 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/DEF056500841.
Symphony No. 29 in A Major, K. 201: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7292999b6d9c0d6f50863076291214bd86e7e24703d429a63aab1f953f5ec8cc. 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/DEF056500842.
Symphony No. 32 in G Major, K. 318: III. Tempo I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbbf9998f8aee32675a2da43fca976563ad89eb0ab2899c161431196885fd34. 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/DEF057701273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4168389d62ade00bdf6a26296c0e9d9d767a1fca592b7f4d938a2d2d667160ca. 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/DEF058230601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779130f53d03f8b9b46b3f05d4f6e92cfa33843012d82d6d40d05592fa538d9d. 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/DEF058230615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1b83c5880cdc97f81372c40a225e70c807e20f3d9c73c917d7ac66c239782a. 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/DEF058230665.
Nabucco / Act IV: Cadran, cadranno i perfidi ...O prodi miei, seguitemi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9b97d63487881c9fcc345575e199114cb4f23ffca2470d89d7f2d2e87640be. 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/DEF058230617.
Die Herzogin von Chicago / Vorspiel: 4c: Alle Zigeuner her zu mir..Hör' ich deine Geige...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe002567bb8f308929e40199f952df903c3a9d3126ef769e39bc561247f1a6f07. 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/GBF079840909.
Die Herzogin von Chicago / Act 1: 9: Wenn ich eine kleine Frau hätt'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc052b60f178499d0c13ea04a15127500919ee7e7cdad617796ff5e3a1a9513c3. 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/GBF079840924.
Richard Wagner: Tannhäuser (Bayreuth 1955)
Millöcker: Der Feldprediger (Querschnitt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c384978358911c11d2ba4ae99f0ca851ef1f1b3bb9a1a95f03b363bd01058f1. 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/DEF058031101.
Die Zauberflöte, K. 620, Act I: No. 1, Zu Hilfe! Zu Hilfe! – Dialogue. Wo bin ich?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac3b011943aafa673628cd921b71df466ef432bb7e85d9b1f84514963f480db. 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/DEF058031102.
Die Zauberflöte, K. 620, Act II: No. 17, Ach, ich fühl's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a0617481152b3d5aefb0b00f1f6905c30c01282e028feb559fbf2451dae6e8. 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/DEF058031113.
Die Zauberflöte, K. 620, Act I: No. 3, Dies Bildnis ist bezaubernd schön – Dialogue. Rüste dich mit Mut
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270bb172a1cb306f4e9a3d7640acfc9f430ef7030505374f76ea4580dd88ae71. 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/DEF058031104.
Die Zauberflöte, K. 620, Act II: No. 20, Ein Mädchen oder Weibchen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7ceda16986c86b388ba4807c9fd5640dc4e92ae4c636199de1c481b8b6e082. 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/DEF058031115.
Die Zauberflöte, K. 620, Act II: No. 21, Finale: a-b. Bald prangt... Du also bist mein Bräutigam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8468799f8fda5997d0ccc7ec2aac38fbe7ac9f0aef2e853ae130aa068dfecc7a. 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/DEF058031137.
Die Zauberflöte, K. 620, Act II: No. 21, Finale: c. Chorale Prelude. Der, welcher wandelt diese Straße
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa8fba85fd3ee42d600e00b195b55f580ae453e943de12213abb35ae4f7f9a7. 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/DEF058031138.
Die Zauberflöte, K. 620, Act I: No. 7, Duet. Bei Männern, welche Liebe fühlen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d4234d86f2c0cfca8610e1030dab569a8943561d55d1ef3fe223b39098ad8e. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEF058031106.
Die Zauberflöte, K. 620, Act II: No. 21, Finale: d-e. Tamino mein, o welch ein Glück – Wir wandelten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4b1b0f1699238ff80669c64c8c9dde79be558fc862efab72a8898b355b7916. 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/DEF058031139.
Die Zauberflöte, K. 620, Act II: No. 14, Der Hölle Rache "Queen of the Night Aria"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe04e48ed51138e376cd03b4d4143498c7f284333a01c7cfebada37921a68db7. 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/DEF058031110.
Die Zauberflöte, K. 620, Act II: No. 15, In diesen heil'gen Hallen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f7ed0cc0e0253205548464026fe70dc9b0daee73b2ede01f038e41ecae756a. 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/DEF058031111.
Die Zauberflöte, K. 620, Act II: No. 21, Finale: i. Die Strahlen der Sonne – Heil sei euch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad16c05c5cf301e620078cd64b1e81fd1374c69e9bd96edabc0758d80d1904c. 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/DEF058031117.
Wagner: Les grands opéras I - La discothèque idéale de Diapason, Vol. 16
Wagner, S: Heidenkonig (Der) (The Heathen King)