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 0x0d639eb725f0342805531543133a3568928edb09f72dc0e34ab57703d9f0c523. 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/5d969bbd-22e9-4753-8f58-76fa05974262.json and https://artists.proofprofile.net/proofs/artist/5d969bbd-22e9-4753-8f58-76fa05974262.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Copenhague (Arr. F. Anderegg & E. Ribeiro for Violin & Piano)
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 0x032c4e6ae3b4068263ef3d7d92c3a8344a0391c808c68a782b82088ce0718645. 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/HKI191800808.
Brave New Worlds: Music from the Americas
Choro na chuva (Arr. for Violin and Piano by Francesca Anderegg and Erika Ribeiro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be1b9e8c391f089de06f45e5ce9ac0a9e33830fd0e48fd0768110f80f3ea0e3. 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/QZAQT2401805.
Samba pro Rapha (Arr. for Violin and Piano by Francesca Anderegg and Erika Ribeiro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd51951fd9c5bead08b1f5fdbb2eb2877500528e9df9d9329b691046a569a3da. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZAQT2401801.
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
Sonatina in D Major for Flute and Piano (Transcr. for Violin and Piano by Francesca Anderegg and Erika Ribeiro): I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa574c888d7a28dd7b2ac20a33ceb1a06ea5c76b4902e88eb71f52188e87f2059. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZAQT2401802.
Sonatina in D Major for Flute and Piano (Transcr. for Violin and Piano by Francesca Anderegg and Erika Ribeiro): II. Expressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a096a78ce5f93d9ddc89a3a7c3d645b65bd2b4597d0d4cdd4bb196a3897041. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZAQT2401803.
Espiral (Arr. for Violin and Piano by Francesca Anderegg and Erika Ribeiro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e0277c57d844b1c0a25b46862f94e0ee4ff6776265e14088fdcdbdb22ad16e. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZAQT2401806.