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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f979af89ef77f7eb7e66a4ed779a20eed3ca0de681701c67c4a12d34f927a2. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54a31c24-5d56-4bf9-ba99-b6c1ad052fc2.json and https://artists.proofprofile.net/proofs/artist/54a31c24-5d56-4bf9-ba99-b6c1ad052fc2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
To Hope! A Celebration: I. Processional - Live at the Washington National Cathedral, Washington, D.C. / June 12, 1995
Duke Ellington School of the Arts Show Choir
Dave Brubeck: To Hope! A Celebration (Live at the Washington National Cathedral, Washington, D.C. / June 12, 1995)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2247b232de73d6ffd3abf060a10f3985ca725a46d5834d4c152d8cab3eb0920b. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USTE10301430.
To Hope! A Celebration: IV. The Peace of Jerusalem - Live at the Washington National Cathedral, Washington, D.C. / June 12, 1995
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffd4aa527986dc285acc2864426421d992bafa9334a49ca89d72f0841f24aae. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USTE10304430.
To Hope! A Celebration: XIV. All My Hope - Live at the Washington National Cathedral, Washington, D.C. / June 12, 1995
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ed0d1bf8edbcc2931bc4012ac421080d37f9e703623dc5d32ff6605ea2680c. 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/USTE10314430.