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 0x46527a3e876f1623517a45ba19b78e28c36f4ff3516e141520e9f5004f446bd3. 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/499d6f30-1ab1-40a8-a6b9-a9bd9acb8348.json and https://artists.proofprofile.net/proofs/artist/499d6f30-1ab1-40a8-a6b9-a9bd9acb8348.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ellen Taaffe Zwilich: Double Concerto; Triple Concerto; Piano Concerto
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 0x452c67421afc4804f2df4560ee4fd57f27b19039452c9d7d53ac1125c2120cb5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10310673.
Kinderszenen, Op. 15: No. 7, Träumerei (Arr. for Violin and Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427f7ac1e3ddc5ea96d6b152f88ee9b63ba23be4ee1d9fd04cd35b854711552b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10310672.
Nocturne No. 20 in C-Sharp Minor, Op. posth (Arranged for Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a820c31f9cef6980d503e1e1c357bf4658e8eff182fbd334378fdaa9cea1ac. 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/USSM10310670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4041c27fbce34104642aedba4c81d202ef6a57b67a71d13b4a92504d0062df00. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10310662.
Songs My Mother Taught Me, Op. 55, No. 4 (Arr. for Violin and Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf129d666d45d3f4612f43bbc329c44b4f357f6125477e562e6a57756c5197501. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10310675.
Gianni Schicchi: O mio babbino caro (Arr. C. Leon for Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392b23e04b3288941ff3d74a0feadf951d5e20dea1a0a3903c0914d906e1485b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10310665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fab7767f6acd9daea344c9ac754ac0162c7f2b1fe774b7676944f846c31ddb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10310664.
Pur ti Miro from 'L'incoronazione di Poppea
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2984895309295ee379cb0f2efd94c4a3066de79b13b06a6b3869487161a02a86. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10310668.
Piano Concerto No. 21 in C Major, K. 467: II. Andante (Arranged for Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5064979c3a5651aabccd3efef70b0d26ad03757f53f7be35f5fcb0406ba6fc5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10310661.
Orfeo ed Euridice, Wq. 30: Dance of the Blessed Spirits (Arranged for Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc07dc738216beab2ab52f36004eec0bf6648642331407f6a80cb0ac39b5a550. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10310666.
String Quartet No. 2 in D Major: III. Nocturne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9618e45df8a353083e5b388945f9cb32987f1596046cab1de2d71e43bee881. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10310669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ce6ba979f12528c0b84325d14489c4eba9cf1f08ea2aa46f6cf2ca21992ea9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10310663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427f7ac1e3ddc5ea96d6b152f88ee9b63ba23be4ee1d9fd04cd35b854711552b. 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/USSM10310672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5064979c3a5651aabccd3efef70b0d26ad03757f53f7be35f5fcb0406ba6fc5. 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/USSM10310661.