thumb|A Paveway III seeker head, at the Royal Air Force Museum London in Hendon, London. thumb|Paveway III at ILA airshow 2006 thumb|Top to bottom: A Paveway II computer control group, an Enhanced GBU
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 0x8e9e963c43dfdf6bbbe820c21ca9610ec26b146500763e8be3537d53b4482b62. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b2bc361-4dff-4037-9d15-0fdd8214fb26.json and https://artists.proofprofile.net/proofs/artist/5b2bc361-4dff-4037-9d15-0fdd8214fb26.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x6f48288cecb2d9a431238516721c6c5b355cbad371d9e0ce8560dbe3e4b7f854. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZWV32331551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4769402739b122aa76cc185aa36c3f7856923dc4a2460eaef3f2d7bd1504fdd6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:25:15Z), 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/USLZJ2403033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52ea2afb18998701aebe4645f9a2ec41bf545c4ec275d3a0c18aaaf10ea4b12. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:03:23Z), 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/QZZ8A2408394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44302639c975cd2d4bd139ab3c5336708c4af266fc33202a1dca124d70782f4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USLZJ2538337.