thumb|289x289px|Ribeiro in Bordeaux in 1972 Catherine Ribeiro (; 22 September 1941 – 23 August 2024) was a French singer. Ribeiro was an experimental folk and avant-garde performer whose work has att
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 0xf5f4f02f767adab2011fbd1bdcde8be978b58929d215070c6f4c01275eb3cc95. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a6e5bbf-e4cd-46ed-8fe5-df15e78edb70.json and https://artists.proofprofile.net/proofs/artist/4a6e5bbf-e4cd-46ed-8fe5-df15e78edb70.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fen​ê​tre Ardente (R​é​é​dition anniversaire 1993​-​2023)
Fenêtre ardente (Réédition anniversaire 1993-2023)
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 0xf728046289328604f8b2a1d64d1fff62ba7911a266910e8b391c57346e27ad27. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES5060705919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1258e5cca8c4644054cff933636c4834b113c364ce7a91d564bfe499ee64c272. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRZ036606320.