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 0x5564dd6c6bde2f10bf866e597f8e8c9379d6e06ad2b83f7ba556face8695515d. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93bb5bc5-03c0-468a-8792-f40d8da03234.json and https://artists.proofprofile.net/proofs/artist/93bb5bc5-03c0-468a-8792-f40d8da03234.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pohjan Neien Kuolo (The Death of the Lady of the North)
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 0x68b5a5348a597966a73b02c9334c39b97e99b3eb16a45930d2f960c95a5de0d9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ESA012512482.
Soitto Soi Suruisasti (Sorrowfully the Music Plays)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00af2651ed26b25f7e3f6e7b5e2be79468bfc65781e7558bc0ff72743e5656eb. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:55:42Z), 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/ESA012512483.
Karjalan Kunnailla (At the Hills of Karelia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae30016ccd7aa58e5dad1d3fb489e36089cde27953e3394b4689a2c4faf762fa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ESA012512484.