1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x70c675c3e4ed47c36f56a7651dae3a10bc55e00272ec3912d95620025b11f755. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfc8e943-7dba-4927-b6c2-6f3300baeba8.json and https://artists.proofprofile.net/proofs/artist/cfc8e943-7dba-4927-b6c2-6f3300baeba8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piaf ! Le spectacle (100th Anniversary World Tour)
La complainte / Sous le ciel de Paris - Live
Medley: Cirque, La fête continue, Bravo pour le clown, Les flons flons du bal - Live
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 → block OTSBitcoinBlock must exist at that height 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 0xc29a0149b114cea12ba7962aa14fbc51a5d6f7a008929a13d775edb089dc8115. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR9W11923457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22bc612dc988289491a7b1a1e6b495ce0d2903b93245408730c95e95009d64a. 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/FR9W11923460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9756c887a3518a1f878531e9b10eb8ef20bfa0d9f89741bf9a9ca7d1cc985ea5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR0N62400005.
Christophe Colomb, Op. 102: Introduction
Madeleine Renaud / Jean-Louis Barrault Company Chorus
Madeleine Renaud / Jean-Louis Barrault Company Orchestra