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 0x2b794c2622884f791ad858cf52fe58cb36a25cd12c8ca465fa7b80c9db20017c. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70d502f1-e69b-4722-a774-391cd1793302.json and https://artists.proofprofile.net/proofs/artist/70d502f1-e69b-4722-a774-391cd1793302.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Polish Radio Jazz Archives 10 - Mieczyslaw Kosz Piano Solo
Piano Solo - Polish Radio Jazz Archives, Vol. 10
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 0x8c2c4783d0959afc71c401a75cb3bbc489c9360af47f2e7b20fcb17a7e66ac8b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/PLA391362901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfbfe4b8d657147509638b2b1780c71a1c3eac831026271832556d7e069d407. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:11:42Z), 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/PLA391362904.
Polish Radio Jazz Archives, Vol..37, Mieczysław Kosz Solo, Duo, Trio, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e30410e8ddf0376f547d8cbb42b6ccda0824ca530813df7d7908364dcb61a4. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:30:15Z), 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/PLA392400152.