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 0x567843ecd71a12ad90eafe03f590ec66825f7e69f1f422b4a7cbdbf4ac707f1a. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40b52aab-693e-44f3-a72c-7cd4fdd48038.json and https://artists.proofprofile.net/proofs/artist/40b52aab-693e-44f3-a72c-7cd4fdd48038.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
On The Wings Of Love: Piccola serenata notturna: Allegro
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 0x583722891b97dec925676fc1bd35276f889d313d4719fefdc03da55e6dc19380. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITF460400059.
Meneghini - Concertoni a quattro parti (Transr. for Orchestra by Giulio Meneghini)
Ghedini: Musica da Concerto, Musica Concertante, Hindemith: Fünf Stücke, Op. 44 No.4
Pray for the Peace of Gerusalem - Nigun di solitudine e abbandono
A War Concert: Transcriptions by Jascha Heifetz
Estrellita (arr. J. Heifetz for violin and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b87f8ce4bf1286f2c839e48d602003f6ea57ac6184d34bbcd184261688f602. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/ITDQ71451832.
Londonderry Air, "Farewell to Cucullain" (arr. J. Heifetz for violin and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c928897b0b3e22c2de4ffb03d766d77fc0679e970c718b6a0bf267653fa06a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITDQ71451834.
Old Folks at Home (arr. J. Heifetz for violin and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7037573f7cc3680d4e063e9207133e6ec7035f8f5ba16887ce18d8260d02ffd8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITDQ71451839.
Deep River (arr. J. Heifetz for violin and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025002bf2507a1ab970a48e62e9017f274f19a5d710288e90bf420e9f1513445. 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/ITDQ71451831.
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
Porgy and Bess (arr. J. Heifetz): Act I: Summertime - A Woman is a Sometime Thing
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04a68c40c8e8ccf309548d702040c94e562689cfab2d626b0e1cd32a22b9303. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ITDQ71485183.
Vivaldi: Sei concerti per fiati e archi solisti
Adaiewsky: 24 Preludes for Voice and Piano - Piano Music - Berceuse estonienne