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 0x200ec10c4f0fc45bcc28dc098020365df609b031b62b92c545d19e822b376bec. 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/2ae3f0bb-d6c6-467f-a0f0-a43d369a29f8.json and https://artists.proofprofile.net/proofs/artist/2ae3f0bb-d6c6-467f-a0f0-a43d369a29f8.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Deux Arabesques (Arr. for String Quartet by Paul Cassidy): Deuxième Arabesque
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 0x900060dcfe1a39e6fd2186611cc6dbacda732da683dd45bef609899ad8b78e7f. 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/GBLWD2301301 — a six-check JSON result.
Prelude X, BWV 855 (Arr. for String Quartet by Paul Cassidy): Prelude X, BWV 855 (Arr. for String Quartet by Paul Cassidy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4201f8b118e97fe27eced953fd1cbf20d167851fe86314214146bc2f7f2fd577. 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/GBLWD2301302 — a six-check JSON result.
Trois mélodies, Op. 7: No. 1, Après un rêve (Arr. for String Quartet by Paul Cassidy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6651d61c1620139058105a414764ce9f8082e84aaabfa71f7f227edf3966a49. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD2301303 — a six-check JSON result.
Five Pieces for Two Violins & Piano (Edited from the Film Music for "The Gadfly" by L. Atovmyan): No. 3, Elegy [Arr. for String Quartet by Jacqueline Thomas]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ea9b62814e682efa9b0b51bf7b69987c039fcf643df4c048c191ce8d121360. 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/GBLWD2301304 — a six-check JSON result.
Five Pieces for Two Violins & Piano (Edited from the Film Music for "The Gadfly" by L. Atovmyan): No. 5, Polka [Arr. for String Quartet by Jacqueline Thomas]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61ac3433cebc75fe458121f849e1db9d4c7c4d8da08a98216085c4768787edc. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBLWD2301305 — a six-check JSON result.
Préludes, Premier livre, L. 117: No. 6, Des pas sur la neige (Arr. for String Quartet by Paul Cassidy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515177d614a57aac779cf36ed8cbd81dd2b13c6a5314fc365dab546dcb32ece8. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBLWD2301306 — a six-check JSON result.
Le carnaval des animaux, R. 125: XIII. Les Cygnes (Arr. for String Quartet by Paul Cassidy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93aaaca54bf1577bfb1f3624d786fd36cc209dd9d061fd7bfab256e94a45fc59. 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/GBLWD2301307 — a six-check JSON result.
Suite No. 3 From the Ballet "Gayane": No. 5, Sabre Dance (Arr. for String Quartet by Andrew Haveron)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38853351fafc61da99194dbab856b9840d7069ebabe57d28ad1e1b7ee27cb618. 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/GBLWD2301308 — a six-check JSON result.
Adieu (Arr. for String Quartet by Paul Cassidy): Adieu (Arr. for String Quartet by Paul Cassidy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e89a1700485778b5f5df08c856c7be9ea69533f080d2fae4a7e68d841ab918. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLWD2301309 — a six-check JSON result.
Deux Arabesques (Arr. for String Quartet by Paul Cassidy): Première Arabesque
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fc95ea767404cde390e0527d7794b1f2ed6a7916e3d4ed1500f9a9ed4d533d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBLWD2301310 — a six-check JSON result.
Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight": I. Adagio sostenuto (Arr. for String Quartet by Paul Cassidy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4559db4f3ea8cee94a2a203a7f32f28840d1747659514ae6f2d3779e40727c45. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLWD2301311 — a six-check JSON result.
Gnossienne No. 1 (Arr. for String Quartet by Krysia Osostowicz): Gnossienne No. 1 (Arr. for String Quartet by Krysia Osostowicz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a659436a6e9b6a0405f1ca680f8dcab41139ff848d96f2ace425ea77b6dbca. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD2301312 — a six-check JSON result.
Solace "A Mexican Serenade" (Arr. for String Quartet by Jacqueline Thomas): Solace "A Mexican Serenade" (Arr. for String Quartet by Jacqueline Thomas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f28c11e8f906b2c20043068ee621a6d67d64f0199103399be33ed4032aa34e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBLWD2301315 — a six-check JSON result.
An Intimate Letter from the Judean Desert: An Intimate Letter from the Judean Desert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484c291ae2cc235ab75a79c0c53440277ac7f126c1d5cc340d26c77547d7d467. 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/GBLWD2301320 — a six-check JSON result.