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 0x47c9e63fff87e77eacd20bff99f7f1524caed469718066e151d5d5588f818ec7. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f21256b8-a38a-4978-80d2-8c39d7d2f2e2.json and https://artists.proofprofile.net/proofs/artist/f21256b8-a38a-4978-80d2-8c39d7d2f2e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cello Sonata No. 1 in E Minor, Op. 38 No. 1 (Arr. for 2 Cellos): I. Allegro non troppo
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 0x80d11a9812e22eaacb53716fba435b9bdcbc92c5dd75d20ecb9ea8dc042fb95c. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/CAHKR1800001.
Cello Sonata No. 1 in E Minor, Op. 38 No. 1 (Arr. for 2 Cellos): III. Rondo. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ca29b319fa95dd07817e5cbbaafd70d755d4d8eed37f4820a940453e5f02e0. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:47:55Z), 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/CAHKR1800003.