thumb|Share of the Société Lorraine des Anciens Établissements De Dietrich et Cie, issued January 1928 thumb|right|Lorraine-Dietrich 12 HP Torpedo 1912 thumb|right|Lorraine-Dietrich 130hp 1909 Lorrai
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 0x1198c36774f26cf3de5fcc1d2e2b342879fb486851abc4b5325da3edb6b80918. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/088b27f4-dcf4-40ef-bf49-ba5a92f60eb9.json and https://artists.proofprofile.net/proofs/artist/088b27f4-dcf4-40ef-bf49-ba5a92f60eb9.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 0xe083ddea78d729e55549279f21f57424ac382e47e61db6db13fd157273f0ae15. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:02:26Z), 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/QZNWR2208671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb2b08de06d0f941c599c3b4161b5de5b43fd0050ffde02b3bed4ee321b6ff2. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZTAX2223243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c352aa830eac3cb64d90a7fe2789e1c18ac713694f817fea1308db30e46c63. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6H2328739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb2b08de06d0f941c599c3b4161b5de5b43fd0050ffde02b3bed4ee321b6ff2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTAX2223243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c352aa830eac3cb64d90a7fe2789e1c18ac713694f817fea1308db30e46c63. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6H2328739.