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 0xf586302e1a05e0fd75ebe0ad03d05bb003c0ded55fe77330a0190654587430bc. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db8d113c-4a62-4af0-af8f-adc08e48922a.json and https://artists.proofprofile.net/proofs/artist/db8d113c-4a62-4af0-af8f-adc08e48922a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x98dcc005f6d985aae5ff71e3a3fff9590fc092a8a128de08f4e798179a5fee15. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:52:46Z), 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/UST8K1684323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fe585442633fc4cf95f44237aa2df39cf2501bc669949e7e6dedeb2e828ce2. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/UST8K1684333.
Scott Joplin: Gladiolus Rag (Arr. For Brass)
Scott Joplin: the Chrysanthemum (Arr. For Brass)
Scott Joplin: the Ragtime Dance (Arr. For Brass)
Scott Joplin: the Sycamore (Arr. For Brass)
Scott Joplin: Sugar Cane (Arr. For Brass)
Scott Joplin: Euphonic Sounds (Orchestral)
Scott Joplin: a Breze from Alabama (Orchestral)
Scott Joplin: Reflection Rag (Orchestral)
Scott Joplin: Weeping Willow (Orchestral)
Joseph Lamb: American Beauty Rag (Orchestral)
James Scott: Sunflower Slow-Drag (Orchestral)
James Scott: Grace and Beauty (Orchestral)