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 0xa3c23bfcab0692438dcc75559783cdc3b9691f604cc6054f492363176f9a0155. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7447a4b7-9fa4-4f8e-96c4-f9b22eb28559.json and https://artists.proofprofile.net/proofs/artist/7447a4b7-9fa4-4f8e-96c4-f9b22eb28559.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Smiles and Chuckles Rag (feat. Rick Benjamin)
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 0x213502edd812f455ad922dd12fff9fb8c61238e5ca9a164a7ab65866c3cf7f1a. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USX9P1340775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65f9e5c1c7371e39c6ef1f546291c96ff8aac8f48f55ce9fa328e6895a61436. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:24:59Z), 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/USX9P1328843.
Black Manhattan: Theater and Dance Music of James Reese Europe, Will Marion Cook, and Members of the Legendary Clef Club
Black Manhattan: Theater and Dance Music of James Reese Europe, Will Marion Cook, and Members of the Legendary Clef Club (Black Manhattan, Vol. 1)
The Paragon Ragtime Orchestra (Finally) [Plays "The Entertainer"]
From Barrelhouse To Broadway: The Musical Odyssey Of Joe Jordan
You're a Grand Old Rag - The Music of George M. Cohan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be62dcfadbc52a4eecb0aceda259d1761ce1ddeaab541c8a89395448f800f02. 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/US4QP0868502.
Midnight Frolic – The BroadwayTheater Music of Louis A. Hirsch
Minding the Score: The Music of Harry L. Alford