{"copyright_id":"0xe9369cd392f053cfc1a8b7deeba9fe2bcbf1b20160abe7058fea4d6a616b4643","name":"Le Villejuif Underground","registered_at":"2026-06-15T01:19:45Z","symbol":"NIM0637046","token_address":"0xfe0fb47ef049ff1e0f52faadb3f05bb9deab1eaf","type":"artist","uuid":"c515cb2e-5d4c-4e48-a9c2-59ce8e26c125"}
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 0xe9369cd392f053cfc1a8b7deeba9fe2bcbf1b20160abe7058fea4d6a616b4643. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c515cb2e-5d4c-4e48-a9c2-59ce8e26c125.json and https://artists.proofprofile.net/proofs/artist/c515cb2e-5d4c-4e48-a9c2-59ce8e26c125.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 0x7ed80ce32d5d541684e8ab5547dac4e1c5f3d151a70fed145fd8043ee7680567. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FR0Q11800905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160f7e37cb6b95813fc211b5a6910ca9f02577bdb1247df10006b53f38ff1f1d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FR0Q11800906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c74a7b82d0732b526247fa42d6aadb7d4e386315535b64569fe156e41b6d1b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FR0Q11800907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0515a885350c14ee31d463b5d05dcaedef5e57b684b300988def8c62f8d6b297. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR0Q11800908.
Ghost of the Water / Les huîtres à Cancale