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 0x3a7e8f9928e9744657c0f516dc5e6a193941f47541f0e7f4a41e1639dc5dc7a2. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fab55ea2-1a7e-4ecd-9bfc-fd944e84e0b6.json and https://artists.proofprofile.net/proofs/artist/fab55ea2-1a7e-4ecd-9bfc-fd944e84e0b6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Intégrale Des Sonates Et Diverses Pièces Pour Orgue
Violin Sonata No. 18 in G Major, K. 301 (arr. A. Kniazev): I. Allegro con spirito
Mozart: Violin Sonatas Nos. 18, 24, and 27 (Arr. for Cello)
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 0x2c3ae0813d4087c2d813b357509c989bbb0b15c783d9918ea52e92f31e5094d3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJZY0500142.
Violin Sonata No. 27 in G Major, K. 379 (arr. A. Kniazev): I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b36cf527df161e34ad99bf28a438e8d31d741421c6be66c16f4a027841ec25. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBJZY0500140.
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
Violin Sonata No. 27 in G Major, K. 379 (arr. A. Kniazev): II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d035d517b9557b34eaf844247684873f5b1f8dbb09f8b1d4d1fc4d93243c033. 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/GBJZY0500141.
Violin Sonata No. 18 in G Major, K. 301 (arr. A. Kniazev): II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a287f5adf3bede553840ff2aff72f76fd6de2f353c4006cf50ac50c8c06706. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBJZY0500143.