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 0x6342c679998c6234898830f3ee5195b172278f864f6da0fcc331bd19df8afc4f. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ae1bf78-1401-4675-a78d-287cdc4a370a.json and https://artists.proofprofile.net/proofs/artist/8ae1bf78-1401-4675-a78d-287cdc4a370a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
HMS Hood Last Voyage (Sailing The Endless Sky)
To All The Sailors Lost (Drowned Sailors)
USS-Iowa-Class-Battleships (Iowa, New Jersey, Missouri, Wisconsin)
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 0x00394773e9c2b6843ead8eb92a15a0c45c82651299ccb2081da95ef6b63acddb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFN2453592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123cde7aae783781442c6acb97f5ad11b0285b18dccb6a497ebb15151e5c1aa9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFN2453595.
German Pocket Battleships (Lützow, Admiral Scheer, Admiral Graf Spee)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d91fd25f12f52087d681b6da50d30c8f75098c4f16e7217a37d08fe8225bba. 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/QZTAY2570085.
kriegsmarine Schlachtschiff / Battleships (Tirpitz Bismarck Gneisneau Scharnhorst)