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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1e518f5c266cd1674ad86f491684e32ebd176883fa339ffb9688271158b807. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a520263-3e33-476a-8f9f-e4acfaf23d57.json and https://artists.proofprofile.net/proofs/artist/9a520263-3e33-476a-8f9f-e4acfaf23d57.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Lekeu: Les fleurs pâles du souvenir (Complete Works)
Delage: Quatre Poèmes Hindous, Contrerimes, Sept Haï-Kaïs, Quatuor à cordes in D Minor
Belgian Radio and Television Philharmonic Orchestra
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa532a57847d6de341fd270c58d7da15071b5b4e839a8c1f7829ce96422adb301. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290101 — a six-check JSON result.
Manon Lescaut: Act I: L'amor? ... l'amor?!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3107172f9b659992ea8645cadfe7aa5588e35360e4038a27dd68ed65cf329a89. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290102 — a six-check JSON result.
Manon Lescaut: Act I: Tra voi, belle, brune e bionde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e7ed7bfdfe4cdf69ea375c7f73825d9e043d64263a7ee3c1abaa04779501df. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290103 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8a0fae9be9e754664d3add3bd15443cbad73d5999d7f821f04f401686b1cbe. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290104 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9dac1b97d9d364b188a96ce2bc87c49d238e82de5f73aaf43e8a437b771c7c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290204 — a six-check JSON result.
Manon Lescaut: Act I: Descendono, vediam! Viaggiatori eleganti, galanti!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffd93b398be34a8c128723ca1656604fa6aa03d2e4e07f55149743a6ad82723. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290105 — a six-check JSON result.
Manon Lescaut: Act I: Cortese damigella, il priego mio acettate
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778945ab1d106507e298408048540908095fbf71f551a292a19ac7b52c286a1e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290106 — a six-check JSON result.
Manon Lescaut: Act I: Donna non vidi mai simile a questa!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab5213d6a14a180866aee7ad3aeb1fa45b9274c357a2cb301f3fdebbc8a7bcd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290107 — a six-check JSON result.
Manon Lescaut: Act I: La tua ventura, ci rassicura
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca06def46dee176ef3cede0785e216b947aa7fc0c62e1847d845d653e0f2c6d8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290108 — a six-check JSON result.
Manon Lescaut: Act I: Vecchietto amabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37a0f30854e28d1f8c5bd62b64e7888e6fb8ee102f40158a42890d1b8138146. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290109 — a six-check JSON result.
Manon Lescaut: Act I: Vedete? lo'son 'fedele
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa5ebcb5aa6e6a16be786f09047db911543953c019813c9ba75264ef32cca52. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290110 — a six-check JSON result.
Manon Lescaut: Act I: Non c'e piu vino? E che? Vuota e la botte?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe0b2dc7491664cdfa9277d98ee2225794b641e61eb09abb920acd77de95215. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290111 — a six-check JSON result.
Manon Lescaut: Act I: Di sedur la sorellina e il momento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae0af7be4c344d3c7c7955d7698a68865d812ecae3bdf06c22d61c52c23fe60. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290112 — a six-check JSON result.
Manon Lescaut: Act II: Dispettosetto questo riccio!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f633247b05932d050ad7272efab6205c5a3db79bae24779ae09112b1bb12fb5. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290113 — a six-check JSON result.
Manon Lescaut: Act IV: Sola, perduta, abbandonata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a332f6df1748a6e9011ca3e2ce3be10732348176f5cbe275c134c4e1a27ed6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290213 — a six-check JSON result.
Manon Lescaut: Act II: In quelle trine morbide
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde056bea8a4fd2e816b7a25fab3965ec5aa55a519159f29123714b48319ed0de. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290114 — a six-check JSON result.
Manon Lescaut: Act II: Che ceffi son costor? Ciarlatani o speziali?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257fdb49caf885e5ae85a475a771bf1dbd179c5e90134ab964210b91b826a6a6. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199290116 — a six-check JSON result.
Ode To Joy (from Symphony No. 9 In D Minor, Op. 125) (featured in "Dead Poets Society")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e1ac1ffffe78b4cf80e2b3e851e84606f711daba8c67805b03818765809e26. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRDG0310140 — a six-check JSON result.
Carmina Burana: O Fortuna (featured in "Excalibur")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fe50438151d1c9691a8292fc6ae7f19f2176d9d42dd42453160b5feb98d167. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRDG0216508 — a six-check JSON result.
Symphony No. 9 In D Minor "Choral," Op. 125: 4th Mvt: Presto ("Ode To Joy")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad83fc060c8fc66fb55f97bc34e8c16a99039001aba2d1889107bb1d646a3637. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRDG0110648 — a six-check JSON result.
Jacqueline Fontyn: Ephémères - Per archi - Halo - Psalmus tertius
De Jonghe: A Composer's Testimony Back to Emotion