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 0x0017add8a9241a5cd35e67ffbd25d3e5b0640df196f2e30af6c6bfa11d0a731a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/837be4c2-99ff-43dd-a33d-6253dba06c9f.json and https://artists.proofprofile.net/proofs/artist/837be4c2-99ff-43dd-a33d-6253dba06c9f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
F. & C. Doppler: The Complete Flute Music, Vol. 5
Ode To Joy (From Symphony No. 9 in D Minor, Op. 125, "Choral") (Featured in "Dead Poets Society")
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 0x62e1ac1ffffe78b4cf80e2b3e851e84606f711daba8c67805b03818765809e26. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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.
Forever Piano (Piano vom Feinsten zum entspannen und ausruhen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b515f1f5d789ae4fcb986fff15a09993d224999e7e198c8da2e31534448c15. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR0W61457646 — a six-check JSON result.
Francaix, Bordes, d'Indy, Pierne & Jolivet
V Rytmu Mistru (The Rhythm of the Masters)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fce63bff4c4c2f539ea9adfc5e621bae8b698e983f03359f915c7f69396d25. 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/CZA161700169 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ac44b50cfd15a264702219dd7569f14e90a8f0c78bdc9998e4827d37ff9693. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA161200835 — a six-check JSON result.
Spiegel im Spiegel (arr. for cello and harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee381b93a6958b4b206fe348b0e88f6c5fae0e8b6fce7a451845a4e90792c8ea. 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/CZM331204915 — a six-check JSON result.
Harp Recital - Ravel, Debussy, Jolivet, Tournier
Benjamin Britten: A Birthday Hansel, Canticle V.- The Death of Saint Narcissus, Folk Songs Arrangements
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b04d5fbf78f8c207d31410c968290f7306a3ae09aaeee0e998d088ca7ccc982. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CZCO72200106 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9c8f61f6ce09ecb87d7a81c51fe0bf266e74bf91bbd70b5a6db54d8cd492a9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZCO72200108 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43163079b488df9ae432378b8e8b6e24e71d387880166572effabed20de0376. 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/CZCO72200103 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bcbb97287a23e78aea5d09ecbb41b4711bdf5cb2babb5ba04a611b587a1c21. 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/CZCO72200115 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf1f50fe49e272a3be969510b9b6ad7552845f7efef3fafc72dd17d937cdaa8. 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/CZCO72200120 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de324d9dbd4b7dcaac74c50e40e893b23f252a02269f407f93c6057cea3bfe9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZCO72200104 — a six-check JSON result.
Homework Hits Vol. 1: The Classical Study Hall
Air On The G String (from Suite No. 3 in D)
Charles Gerhardt & National Philharmonic Baroque Ensemble
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d59e70f81035dd7e4cfdb420de55285537b2a97095475ddb12be58d8a01236. 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/USRDG0111843 — a six-check JSON result.
Chamber Concerto in D Major, RV 93: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b88edd2c61348842e1e10b4d090a5032391704a716e44bdea8147191c4883b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA168702080 — a six-check JSON result.
Florent Schmitt: Lied et Scherzo, Suite en rocaille, A tour d'anches, Chants alizés
Classical Sensibilities: The Jane Austen Companion (Music from 1775-1817)
Concerto for Clarinet and Orchestra in A Major, K. 622: II. Adagio (1791)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44fc0dd7f68cd5927e3d606c55338f1f105b90d4ce76dfa8c41cfbbd790a753. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USRDG0112975 — a six-check JSON result.
Ned Rorem: Concerto for Left Hand and Orchestra