MEI Concert Choir (Mennonite Educational Institute)
{"copyright_id":"0xf781bf41002ae4175586d5fe3f213c758566db900835e63ce91179aeace0d9ad","name":"MEI Concert Choir (Mennonite Educational Institute)","registered_at":"2026-06-20T17:59:37Z","symbol":"NIM1674063","token_address":"0xfb3de5fa1669ef2cf4cca6079fac8888b1ed1694","type":"artist","uuid":"be24686a-2b14-4958-8dc5-8dd87a903bad"}
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 0xf781bf41002ae4175586d5fe3f213c758566db900835e63ce91179aeace0d9ad. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be24686a-2b14-4958-8dc5-8dd87a903bad.json and https://artists.proofprofile.net/proofs/artist/be24686a-2b14-4958-8dc5-8dd87a903bad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
BOHSA 2007: Best Of High School A Cappella
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 0x21c610981c026910fa4cac62a8ed7716380b1f32aafce28d5ea0a97d8e1bfff5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USE830921165.