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 0x422a4a2a1bfa7c4ad249fad1f29a9b40d09c80099f932b74d69f2b2cbf3e91a8. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0285d613-4fac-423f-97a3-55e4c5254109.json and https://artists.proofprofile.net/proofs/artist/0285d613-4fac-423f-97a3-55e4c5254109.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Wozzeck, Op. 7 / Act 3: Verwandlung - Orchester-Überleitung
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 0x4aa21ce09911d7489aa2703da406745ca9ba408b22ab0fa2bd67f7cd0b19a452. 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/DEF056531324.
Wozzeck, Op. 7 / Act 3: Tanzt Alle; tanzt nur zu...!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace205d4e4e8db5b228f22fe6d7258d08c93cdf81b20d57939bbbd091c7f5670. 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/DEF056531325.
Wozzeck, Op. 7 / Act 1: "Du, der Platz ist verflucht!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe83a514c957208d3cf5291ae23393889977b11a273be3b807cf67b6a0072b1. 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/DEF056531306.
The History Of Classical Music - Part 1 - From Gregorian Chant To C.P.E. Bach
Léonin / Pérotin: Magnus Liber / Feast of St. Stephen: Etenim sederunt principes (à 1) (Introit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5913ba8fb14caaa7decf3eff20ecf776a07bcf9614bfd5e1976070ab2e6d702d. 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/DEF059631808.
The History Of Classical Music - Part 2 - From Haydn To Paganini
J. S. Bach: Oster-Oratorium, BWV 249 - Magnificat, BWV 243
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02667d2027ad6113bed965a60c429e8592e474ed6ab9d69c7c4ad53e23843743. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEF056830101.
Le nozze di Figaro, K.492 / Act 2: "Quante buffonerie!" - "Chi picchia alla mia porta?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852df74759ed5703d38bccbff417d09537087b1484fe4c08a5f2f2f6c56828b5. 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/DEF056830138.
Le nozze di Figaro, K.492 / Act 1: "Cinque... dieci... venti..."
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cd8070f8fc6fb7c664ca8329d8c70958d99628e5b2e5da6362348bd38db22a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEF056830102.
Le nozze di Figaro, K.492 / Act 1: "Cosa stai misurando"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fb796041b63e5e77a97a6e57ff2a0a6f63802844a0a5c2df5ca0f26f1870e0. 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/DEF056830121.
Le nozze di Figaro, K.492 / Act 2: "Susanna, or via, sortite"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc594f2c070595b32a718ad4623f02c369ef726cf993dd62ff6ce1a1c7bc4738. 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/DEF056830140.
Le nozze di Figaro, K.492 / Act 1: "Or bene, ascolta, e taci"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81636b722cca5732027ebab5aa901a3c24588be2b3488ac580ec2bd27e2ed8c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEF056830122.
Le nozze di Figaro, K.492 / Act 1: "Bravo, Signor padrone!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f47237496e13589b39754674a4376ba556a4052ea4881135a756558e6cfc7ea. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEF056830123.
Le nozze di Figaro, K.492 / Act 2: "Tutto è come io lasciai"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96ed64a56b06f3c6ad66bb46c8fa6fa0e923dd34e1dcc4a411f25d9de1fa090. 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/DEF056830144.
Le nozze di Figaro, K.492 / Act 1: "Ed aspettaste il giorno fissato a le sue nozze"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f7477ac333781738a54f820bab272d9390309ef2d0b5d771fd42beb773be9a. 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/DEF056830125.
Le nozze di Figaro, K. 492 / Act 1: "La vendetta, oh, la vendetta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c46cc80a7b134a5b027109f170b3413dc759690c3982face2228626be21163. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEF056830105.
Le nozze di Figaro, K.492 / Act 2: "Voi signor, che giusto siete"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac0fcf26095edcbd87e994bc808fb1c04a1926751c122fbc1fd8eb19eb64ab0. 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/DEF056830152.
Le nozze di Figaro, K.492 / Act 1: "Cos'è questa commedia?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1e33aec835b467f3492b390688a09ac62bfd34d3e17a781e8fc9070a60db17. 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/DEF056830133.
Le nozze di Figaro, K.492 / Act 1: "Giovani liete, fiori spargete" (II)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4476f81752d00673a9f700d66c3d422bc01072be9b0e3b1f7fe47e658959c9a. 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/DEF056830107.
Le nozze di Figaro, K.492 / Act 1: "Evviva!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcd03dcca80c2a7f4accf0cd6ddf34a052fdc162516bc96dadba1f81f16be99. 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/DEF056830134.
Le nozze di Figaro, K. 492 / Act 1: "Porgi amor"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d3c17558ae6002f7e874bf92541a74bf6250510695503e2bf95b4365304798. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEF056830109.
Le nozze di Figaro, K. 492 / Act 3: "Riconosci in questo amplesso"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4c70753fa0c8cbdaee845b45425df1bccd720599a33c81538c29cfab312412. 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/DEF056830157.
Le nozze di Figaro, K.492 / Act 3: "Eccovi, o caro amico"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92a475f28826e78935cb985dbb50645d98892156f3ab2ff420684013732b0b2. 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/DEF056830158.
Le nozze di Figaro, K. 492 / Act 2: "Voi che sapete"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abdef85adf9912748223a2c4e1a5e70b32c807391100d0aa5775ad7836117ce. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEF056830110.
Le nozze di Figaro, K.492 / Act 1: "Tutto anchor no ho perso"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88056fecab813ef011c2781e94f2950b3e73145689fea2b1b712390ef5272db9. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DEF056830126.
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
Le nozze di Figaro, K.492 / Act 1: "Via resti servita, madama brillante"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62104611ce84c89cf2c201dbf25c6ab4ca45310400f96ad2d8c688c79456390d. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEF056830127.
Le nozze di Figaro, K.492 / Act 3: "E decisa la lite"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c8192360b3583a9d0b5db5d26dd43968476e885615c469f35b04558e80aa44. 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/DEF056830156.
Georges Bizet: Carmen (Highlights in English)
Sadler's Wells Opera Present Carmen (Highlights Sung in English)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02667d2027ad6113bed965a60c429e8592e474ed6ab9d69c7c4ad53e23843743. 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/DEF056830101.
Le nozze di Figaro, K. 492, Act I: No. 4, La vendetta, oh, la vendetta!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c46cc80a7b134a5b027109f170b3413dc759690c3982face2228626be21163. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEF056830105.
Le nozze di Figaro, K. 492, Act II: No. 11, Porgi amor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d3c17558ae6002f7e874bf92541a74bf6250510695503e2bf95b4365304798. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DEF056830109.
Le nozze di Figaro, K. 492, Act II: No. 12, Voi che sapete
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abdef85adf9912748223a2c4e1a5e70b32c807391100d0aa5775ad7836117ce. 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/DEF056830110.
Le nozze di Figaro, K. 492, Act III: No. 21, Sull' aria... Che soave zeffiretto "Letter Duet"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2571e35f8bb7ddffa9fbbbdace6d7387632712a251a3e5904657b7624150fce7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEF056830114.
Le nozze di Figaro, K. 492, Act IV: No. 28a, Giunse alfin il momento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8311c5ac35fad9d67d1d530630329757cb4c2fbd44b835415463a71239f6b43. 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/DEF056830177.
Le nozze di Figaro, K. 492, Act IV: No. 29e-g, Finale. Gente, gente, all'armi... Questo giorno di tormenti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb0326f164ec3447479141e880d428d2b6c66508e3bf805045c3dc56d687c35. 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/DEF056830118.
Ananda Nidra: Blissful Sleep (Two Sensual Meditations For Awakening Ecstasy)
Stravinsky: Œdipus rex (Collection trésors, mono version)
The Sound of Music (Studio Cast Recording)
Ivor Novello: King's Rhapsody / The Dancing Years