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 0x2771c80c8be713b2234d3545e5857433aa3fa530ca5e1ff1a962d34a9e17c026. 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/6144626f-6f06-4a73-9140-dc9d798cd892.json and https://artists.proofprofile.net/proofs/artist/6144626f-6f06-4a73-9140-dc9d798cd892.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Violin Recital: Trusler, Matthew - Elgar, E. / Janacek, L. / Debussy, C. / Owen, W.: Letters and Poems (The Pity of War)
Just before the battle, mother: Just Before the Battle Mother
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 0xc4653e34d2c72ec6087f39521b11ba7b587fb5bcb0758d69d54c36938e68df76. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBYDS0800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0337d36b980aa0b3448b5fa9f645f191452c92e881adb6d4e2fa4be025f0c6. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS0800028.
Here we are! Here we are!! Here we are again!!! (The British Army's Battle Cry)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe330042931f9cc19d1adc048a7372847b3bd518a2e9b3d69d0e4b1043b5bc8dd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBYDS0800030.
Gershwin, G.: Porgy and Bess Suite / 3 Preludes / Antheil, G.: Violin Sonata No. 2 / Copland, A.: 2 Pieces (Trusler, Marshall) (Blues)
Porgy and Bess (arr. J. Heifetz for violin and piano): III. It Aint Necessarily So
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411fbc06812dda88cab3c662e5de0bb0a6513d09575c50e20106ba26349ff1c8. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBYDS0800039.
3 Preludes (arr. J. Heifetz): No. 1. Allegro ben ritmato e deciso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cd6480f69d837c6750e66f3c906268d4b296809425a47651e25218d5d0d6d2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBYDS0800050.
3 Preludes (arr. J. Heifetz): No. 3. Allegro ben ritmato e deciso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafbc8d9490c9a264a9006b2ddc7aafc57ea6145bd8676a67dfd46c91ab94c85. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS0800052.
Rozsa, M.: Violin Concerto, Op. 24 / Korngold, E.W.: Violin Concerto, Op. 35