Tacchi is a surname. Notable people with the surname include: Andrea Tacchi (born 1956), Italian luthier Tim Tacchi (born 1955), British hedge fund founder
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 0x34652b05d14b59632d66552435eda880c77e367f355c95f21324fa707974e69b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38b39945-4c50-4fdb-9034-091ea08786b8.json and https://artists.proofprofile.net/proofs/artist/38b39945-4c50-4fdb-9034-091ea08786b8.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 0x9e5f42635c3d0f80ce7f23ede75b63b6c9bb5357a7547ea5e1a900e7240a7185. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CHE922110002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa02efa525d997e00b909017aabb878b890d92967ebb838ca68735bca47cc51f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CHE922310008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206887f74f9fee6f7323db76a1b2c8677afd69e570cb5b1140cb07652200579f. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:55Z), 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/CHE922310009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbd6aa7ed9fc647d1e5e92a6d97b88855b5da2b9b27eaa4a9de48d3c5750bd1. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:22:45Z), 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/CHE922510016.