Violet Caroline Bell Denniston (25 July 1890 – 1983) was a New Zealand woman who served in Britain and France in World War I. Biography alt=Enid and Violet are seated in the front centred.|thumb|E
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 0xa58522c5440fe4e2e932dd047ce3c359d747db26fdce6e5059446f6c6f86fffd. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c64c4928-b1a5-41ab-ba9c-f1979298c72e.json and https://artists.proofprofile.net/proofs/artist/c64c4928-b1a5-41ab-ba9c-f1979298c72e.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 0xd7db4c36010752891938bf3ccb26db3b248e93194991458f4d84a88ce41ebd73. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAGC2210683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17826c7a2b803356d8bd07ef98b088fd83784faa0fe437d32c883c1335e1268b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:47:09Z), 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/TCAGF2278463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc663165401bd97bd3fe798bcf593ca3cdb2e14a3983b2d500f919d8724cbbf5e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:03:08Z), 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/TCAGF2298068.