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 0x899b3c73a6817677dc10fa52c253c1df06f447bf8a20a9121f6ca7d89a09fe64. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7efa99e-eaed-4634-b5e4-e87b7e63c356.json and https://artists.proofprofile.net/proofs/artist/f7efa99e-eaed-4634-b5e4-e87b7e63c356.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony No. 9 in D Minor, Op. 125 "Choral": IV. Presto - Allegro assai
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 0xf9d289c25daee872f97f61b033c22db29b2e2dabfc053db8fee6c328607cf115. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USBC18300135.
Fantasia in C Minor, Op. 80 "Choral Fantasy": I. Adagio
Beethoven: Piano Concerto No. 5 "Emperor" & Fantasia in C Minor, Op. 80
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee49ac57c61bf29eef57aa1e4881c5edd9ed1f19e9eccbb79473d4075af7bf1f. 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/USSM11710763.
Fantasia in C Minor, Op. 80 "Choral Fantasy": II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5463751c172bc66967310d8b5f0401ce9e49893905d26e9e960c1d04a0edea8c. 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/USSM11710764.
Fantasia in C Minor, Op. 80 "Choral Fantasy": III. Meno allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7362a2029319c85e420d45e704887287ecb64f31be562394c5c0ca3f01cd129f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USSM11710765.
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
Fantasia in C Minor, Op. 80 "Choral Fantasy": IV. Adagio ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77846324904de79b42f5e6501c081e7157b667389006907f019bb29892d20ea4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USSM11710766.
Fantasia in C Minor, Op. 80 "Choral Fantasy": VI. Allegretto ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd004f6b0ab8661d07d07e20c0824ebb27d3254a9eeaf7ee9c06109d621ba3c6f. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USSM11710768.