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 0x5fa616ce0589c1cc35ff23407df7f75a6ef592e89b9dfec35d5c95b0dc9be7a3. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7b9bb58-aa61-4565-9e38-2cea2e65587d.json and https://artists.proofprofile.net/proofs/artist/d7b9bb58-aa61-4565-9e38-2cea2e65587d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Recorder Concerto in C Major "Pasticcio" (After J.S. Bach's BWV 1053 & BWV 1042): III. Allego
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 0x9bb28511b5cbb8ff5486022b243bac55f2d6ad744d362b93e391c1946e692f0b. 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/DET902280403.
Violin Concerto No. 1 in E Major "Spring", RV 269: I. Allegro (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb405cf8937f9ba7fcce2863cd3b84e66cca4b8c5f3f68fb959e328b4d7746a1. 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/CH4212400030.
Violin Concerto No. 1 in E Major "Spring", RV 269: II. Largo e pianissimo (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691f3ab8a686311714747fc2c65704e723d4b3bbd8caa2b673cc460ddc28dee6. 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/CH4212400031.
Violin Concerto No. 2 in G Minor "Summer", RV 315: III. Presto (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37d88b51ec01edd47f958bd1248350501853fbb272c86c43517e5634050e8a8. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/CH4212400035.
Violin Concerto No. 1 in E Major "Spring", RV 269: III. Allegro (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e4f6b2760a42130dcec3621fed709e6bc97d616f3e6db49180220aae2b823c. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CH4212400032.
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
Violin Concerto No. 2 in G Minor "Summer", RV 315: I. Allegro ma non molto (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e86e89215b5e87d317624db6c37f8cde1264ef3967cc566316655662fd846e. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/CH4212400033.
Violin Concerto No. 2 in G Minor "Summer", RV 315: II. Adagio (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8d2979cffac7469841f0edd8198ceebdff532b86eab2bf5a1b2eae19f97d4a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CH4212400034.
Violin Concerto No. 3 in F Major "Autumn", RV 293: I. Allegro (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc777c21a8283e1ecdea31905670b81dff2728f0da28628a6e6e53bb814c70678. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CH4212400036.