thumb|Pickle juice in Ankara, Turkey. Pickle juice is generally salt dissolved in vinegar with additional herbs and spicy flavours used for preserving food by pickling, but which is also reputed to h
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 0x20a1fae08b8f06b19381f4a9da52317c9bb86175e4aaa7611f2da71043dac8e3. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22469652-58ec-489a-b7c4-e0fc8f340a84.json and https://artists.proofprofile.net/proofs/artist/22469652-58ec-489a-b7c4-e0fc8f340a84.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 0x9735aeeeaab175351cc473b2bfad16ea64b5d08c0eb23d3c168f8625b7790f26. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAS2454325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71b38835cc2659a43c8240c092641bc89cad1bac1ac6535e4cb1e5cf9a7be1f. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZWFJ2475037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c25cfe2bb49cb0539f04b5b9f52654e1bca390908bf015ca3a60c968b68411d. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:59:48Z), 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/QZZ7X2482721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824451dc3e5f4732929ba566e0c83a89c542dcbabcb33928bcfe90d82b1b7704. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZFZ72536442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf568c64455a9aea8cce14b46422afed33fc9e255e59ed00e254e169e9f8f3619. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:52:49Z), 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/QZFZ72536443.