Tonica may refer to: Tonica, Illinois, village in LaSalle County, Illinois, United States Tonica (moth), genus of moths of the family Depressariidae Variant spelling of Tunica people, Native Ameri
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 0x255461c5b263331742abf5c03c036f577a402148c8e961170c0a5fc0339923c4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c93665e-ba09-445c-ad18-fb6ec7de0e18.json and https://artists.proofprofile.net/proofs/artist/7c93665e-ba09-445c-ad18-fb6ec7de0e18.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 0x7dec9935c3d5fe217a002ff46b8f541bd918d0d7fbe7ee0e5b5b9bb0b7909928. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:25:43Z), 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/QZZ7L2417331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6bd250fde058b53615cbdb8a8f10b2162528cda07a2b429cdf5c4296713573. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:53:14Z), 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/QZNWQ2539993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85666dadc274367f54bbd6f5a014bcf9944f252a39400f9233b86b4cf303066c. 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/QZZ7P2561714.