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 0x87cb901b80a2c5ab8e16de85c7d85dd04702bcfdf5c4ea9529a66b7e66a1f4df. 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/7a93d491-e83a-4fa3-aa79-2397f1b66ce4.json and https://artists.proofprofile.net/proofs/artist/7a93d491-e83a-4fa3-aa79-2397f1b66ce4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le chrome et le coton (Edition augmentée)
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 0xcaf77bf2e9a7e9ed7a5d72e8cb17e970cb07d5f0b1fb643950bb7e489e88a4cf. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR9W11215479.
Que vais-je en faire ? (Pendentif Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca524e5701576b9bb34abd4ce02d65122074d13f78a67906e1ac2aeb4db7e287. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR9W11215480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf77bf2e9a7e9ed7a5d72e8cb17e970cb07d5f0b1fb643950bb7e489e88a4cf. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/FR9W11215479.
Le chrome et le coton - Lafayette Remix 2015 (English Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb648139392dfc5594217e3126cf3710995080b5b0a6d921598cfe2db43160e0a. 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/FRPI61500580.
Le chrome et le coton - English Version (Lafayette Remix 2015)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb648139392dfc5594217e3126cf3710995080b5b0a6d921598cfe2db43160e0a. 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/FRPI61500580.