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 0x46eaa099a61f36f23e73eee6c5c30feaef40eb2748252fd87436b7bf8caec248. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6f26e00-1302-4b62-8198-4e67365bbdbc.json and https://artists.proofprofile.net/proofs/artist/f6f26e00-1302-4b62-8198-4e67365bbdbc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Song of Distant Myths (Arr. For Cello and Yatga)
Sonata in F Major for Recorder and Basso Continuo, Op. 2 No. 12: II. Minuet
Benedetto Marcello: Sonata in F Major for Recorder and Basso Continuo, Op. 2 No. 12
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 0xf648b311477c1f227344758bfa9a30ece540a6cceec8dc7ddd5d5ab2ebc681d1. 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/QM6MZ2174987.
Sonata in F Major for Recorder and Basso Continuo, Op. 2 No. 12: III. Gavotta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0fdab275f19deedf96e033a2038353563bf7ee746709de1b1798f335283feb. 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/QM6MZ2174965.
Sonata in F Major for Recorder and Basso Continuo, Op. 2 No. 12: IV. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5a20fdbde5660ddce30e9280b9dd3c92c322a0230335a4fff497a9b6531531. 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/QM6MZ2174964.
Sonata in F Major for Recorder and Basso Continuo, Op. 2 No. 12: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac91970e52ddf0c449c9f051e81018a0fa2d129cdd1c92c011062a0629d8e3b5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM6MZ2174962.
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
Sonata in F Major for Recorder and Basso Continuo, Op. 2 No. 12: V. Ciaccona
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f0c585dc686f61dd64fccb70af5fa622e7ca67302977fc9ba87d54a83ea6e1. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QM6MZ2174989.