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 0x0f38384f6d65c7cdd969b8678cf1f58f76b16c487ce6e1b7da4359fbb2a87fc4. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c131414-2945-4520-aa2c-a5ed8a39f824.json and https://artists.proofprofile.net/proofs/artist/2c131414-2945-4520-aa2c-a5ed8a39f824.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Puccini: Tosca, Act 3: "E lucevan le stelle" (Cavaradossi)
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 0x4339486783c046daccc6bf853715ba5ae1ca2090ef1fd735701386132c96163f. 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/GBBBA0742330.
Verdi: La traviata, Act 1: "Sempre libera" (Violetta, Alfredo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6358d19a883e377257d0693bacefd8334a2985d929e6a57e171198314e6bee1d. 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/DEN960531605.
Vivaldi: The Four Seasons, Violin Concerto in G Minor, Op. 8 No. 2, RV 315 "Summer": III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbfdc326c9e98937c7e52461847d112a7d62a4b9351eba98af84c2f01734ad9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBAYC1502801.
Serse, HWV 40, Act I: "Ombra mai fu" (Serse)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60000545c94712a44eb9238a1c6398b95f50f565446c4fa4a2d682fca703fed4. 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/DEA809431600.
Carmen, WD 31, Act III: "Je dis que rien ne m'épouvante" (Micaëla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd6b5a2f3d21f489d3d3117b42f34776027e3a16e1b30d1c4e22af7a9c7555a. 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/DEA809523354.
Respighi & Rossini: La boutique fantasque, P. 120: II. Tarentella "La danza"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52e71ec72a2ecbc7715d6bca89ba40992e2925293099a7e28cd0ffd0974b862. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBAYC2102311.
Delibes: Sylvia, Act 3: No. 16a, Pizzicati
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ce49bd4869f2827863bde72a3ecaa1070d64c9543d56f11de4d0442fa7fc12. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/FRZ110901410.
Mussorgsky: The Fair at Sorochyntsi, Act 3: Gopak
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded5b676dbd700cf130d0f6342cbfe8161ce430ff580188a56fffa1f10b44759. 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/GBDYG0100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cbc38f7b3c801d0f634a93902c762a6574037c1f74149b282e6be4011e0af2. 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/FRZ112100224.
Ravel: Daphnis et Chloé, M. 57, Pt. 3: Danse générale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e497990c92bf936e43b6af0c0cf4aed2d049c71eaa4ec422d7e22700b864fd. 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/GBAYC1402868.
Chopin / Orch. Douglas: Les sylphides: Waltz, Op. 70 No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80b76b09623b0f94b560192215cefca0194d2a3090e91feee0150f2610de0c9. 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/GBAYC2102459.
Mozart: Die Zauberflöte, K. 620, Act 1: "Du feines Täubchen, nur herein!" (Monostatos, Pamina, Papageno)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162e357b5ffe91065d61daf211d42640541015bbca3d212e06944742a86ce043. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRZ209506922.
Messager: Fortunio, Act 4: "Lorsque je n'étais qu'une enfant" (Jacqueline)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77100192adbbc5321cb9e28510cbf4a05c5a0940a01c482d325ed6a17cbe228. 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/FRZ208707540.
Rimsky-Korsakov: Sadko, Scene 4: Song of the Indian Guest (Version for Cello and Harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0063e9bb68e6c8eb8132bc0f47235e4a93dcb4f80e90e1f43c627ef7e5cc280. 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/GBAYC0502345.
Strauss, R: Symphonic Fragment from Josephs-Legende: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60045ce2be2fc07e0c071e8b039f1c81c965cd5a2965b149f09f089de40904d0. 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/GBAYC2102368.
Boito: Mefistofele, Act 1: "Dai campi, dai prati" (Faust, Mefistofele)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac253b3e9e1223b5b2d2fa0b336e64bf79ecf23b82470290a5c59b280a6bb6a. 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/GBAYC9703718.
Borodin: Prince Igor, Act 2: Polovtsian Dances. "Uletai na kryliyakh vetra" (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd198fb136e7d1b59b0e2e7677565f9638d79e8eab10b45ee657fd6879638db0. 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/GBAYC6600178.
Gounod: Faust, Act 3: "Les grands seigneurs ont seuls des airs si résolus" - Air des bijoux. "Ah, je ris de me voir si belle" (Marguerite)
Orchestre Du Theatre National De L'Opera Comique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea35a927f4c50939b5ef92970adabd415378dc5039e17df3095d83a10e4f0bd5. 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/FRZ112300198.
Puccini: La bohème, Act 3: "Donde lieta uscì" (Mimì)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93d9653a3bcfe4cb55616d777f2f8a57c68fee5a21a2c1c83a0c4a8fcb96ec0. 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/GBAYC1402852.
Stravinsky: Mavra: Parasha's Song. "My Dear Friend" (Transcr. Rostropovich for Cello and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd18f95b8dd4633c38b2ea2033723c47183bbd9cf0392a5d0ad8bf4e39ff47a8. 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/FRZ111000261.
Gluck: Orfeo ed Euridice, Wq. 30, Act 3: "Che fiero momento" (Euridice)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dc9bf24022f0d4236af4b7cadfa9a97bcf8e908e72f73c7d995fb99d97bf87. 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/GBAYC2302602.
Massenet: Thaïs, Act 2: "Celle qui vient est plus belle" (La Charmeuse, Crobyle, Myrtale)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb243d8052c2fd67379743dfa2eefc928957c87beccfc334ed10641ce6bd8dd8. 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/GBAYC1702068.
Tchaikovsky: Symphony No. 2 in C Minor, Op. 17 "Little Russian": IV. Moderato assai - Allegro vivo - Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e44dd93c73ae63a82b7ce38bea5cdff2c6574ef803ace3dc48d8b9fba1d420. 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/GBAYC1901907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25efc11356ddcec07757afa2ebea4f532f26ebb79cf8bf9d6d722dc6e06db8b4. 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/GBAYC8900655.
Bellini: I puritani, Act 2: "O rendetemi la speme" (Elvira)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d02854e3e1efbedb17f1eac50f1dc4f1e144b3460148da9811c432b85e255a3. 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/GBAYC1402836.
Bellini: I puritani, Act 2: "Qui la voce sua soave" (Elvira)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852bedc0e689e5c489c58d62c3f8d794d40703bbdf54b843cec09d5bb9779ffd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBAYC1402837.
Bellini: La sonnambula, Act 2: "Ah! non credea mirarti" (Amina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf5c7cb614dbcf5e8a04f86e02eea6b1581efff72d01cd20a898a0af43a8e1b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAYC1402834.
Bellini: La sonnambula, Act 2: "Ah! non giunge uman pensiero" (Amina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0908c4c8602ae29eaf7fbe63561c2fd21ba48ae5a52bb75e932b31b4745d404. 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/GBAYC1402835.
Verdi: I Masnadieri, Act 1: "Lo sguardo avea degli angeli" (Amalia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cb3b2557ae192f52f2217b710022d8b47e15c967a09d431ba812d2cd764b02. 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/GBAYC1402843.
Verdi: La Traviata, Act 1: "Follie! Follie!" (Violetta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcc5c328522907007477946e3613e0206112c2306da3bd17c142dce1421ff88. 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/GBAYC1402846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93d9653a3bcfe4cb55616d777f2f8a57c68fee5a21a2c1c83a0c4a8fcb96ec0. 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/GBAYC1402852.