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 0x78b46be21a075277b5346b86b4eece282722fef2b49b360cf1157a0e003b35db. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b2c4bc6-ba75-4eb3-8b1c-ab13e9a60d69.json and https://artists.proofprofile.net/proofs/artist/3b2c4bc6-ba75-4eb3-8b1c-ab13e9a60d69.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
John Rutter, Jeffrey Van, René Clausen & Others: Choral Works (Live)
Repertoire for Soprano & Alto Voices, Vol. 2 (Live)
Repertoire for Soprano & Alto Voices, Vol. 1 (Live)
Repertoire for Soprano & Alto Voices, Vol. 4 (Live)
Highlights from the St. Olaf Christmas Festival (Live)
Highlights from the St. Olaf Christmas Festival
Repertoire for Soprano & Alto Voices, Vol. 5 (Live)
Repertoire for Soprano & Alto Voices, Vol. 7 (Live)
Repertoire for Soprano & Alto Voices, Vol. 6 (Live)
Keep Your Lamps Trimmed and Burning (Arr. A.J. Thomas for Choir & Conga) [Live]
My Spirit Sings of Wondrous Things: 2008 St. Olaf Christmas Festival (Live)
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 0xff36588f59df9c517ba35d2973c94647444bc8e8759225b403dd249085174846. 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/USHM81033264.