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 0xbc74ad8c70a3649581e9aa347a0d2f52e7d4667e9ee6e955eacae352f2e3dc78. 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/70397b60-6a89-4025-b4c4-8141f929ce6c.json and https://artists.proofprofile.net/proofs/artist/70397b60-6a89-4025-b4c4-8141f929ce6c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bernstein, Brahms, Burgmüller, Françaix & Widmann: Works for Clarinet & Piano
Pastorale Variée, for Clarinet, Harp and String Orchestra, Op. 31B: Theme
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 0xff24f89370ab58ac2b194a8450a13b97b95400937a5ff977d9fc48729052f29f. 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/DEAQ72249705.
Pastorale Variée, for Clarinet, Harp and String Orchestra, Op. 31B: Var. III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c357ccf6a397b31196b03c829f43645cab28935dc8278d7ec2b8d4b6e7fb648. 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/DEAQ72249708.
Pastorale Variée, for Clarinet, Harp and String Orchestra, Op. 31B: Var. V
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340ee9de1f64e34598f205d4505d18748740bad0aaa96af1590347b955ce76e1. 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/DEAQ72249710.
Pastorale Variée, for Clarinet, Harp and String Orchestra, Op. 31B: Var. VI (Epilogue)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fdc8f19af0e8f056bfb9e95efdb54d68ca547ac27f19a157401a7a40cb2416. 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/DEAQ72249711.
Pastorale Variée, for Clarinet, Harp and String Orchestra, Op. 31B: Var. II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9958c767fe88e864ba72d2e3ce614cee6259f2376d5c3f8e023a915397f836. 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/DEAQ72249707.
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