Five Leaf Clover (French: Le trèfle à cinq feuilles) is a 1972 French comedy film directed by Edmond Freess and starring Philippe Noiret, Liselotte Pulver and Micha Bayard.Bock & Bergfelder p.379 Cas
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 0x6bc07f618798f09308d6dba76c486b1d47d02b78d523126f6116b5fdf1b59433. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fa76aaf-aee5-4997-841b-532baf821b66.json and https://artists.proofprofile.net/proofs/artist/5fa76aaf-aee5-4997-841b-532baf821b66.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 0xbe85846c168b33690e7160c24ec8f0337dca5479f2a3e06d9ac39e6d41a1c520. 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/CZAR31900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fd34c5d1e964f9d257ea6b0fd1db4f16b5ff2e67838e6589daaa639b3daac4. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:27:08Z), 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/CZAR31900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b65959c905d8beaebd2c28822a182307d7f881768b8258f6738998b98896858. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CZAR31900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bb24b77b0403d16a453cbe595736bc9f95b07f9e028258f6d71375015aca11. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/CZA163383780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc78edacfc7ab217f521140be531918d0f7c0481775359ba0501f4300953d55. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:12:52Z), 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/CZCG72301219.