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 0x8817161c53d85ef6cfe57530a51d61fec9f80555ccf8da668b2c5590038d6a02. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a3f16a5-6dd7-4dc7-9981-302a51a191f8.json and https://artists.proofprofile.net/proofs/artist/2a3f16a5-6dd7-4dc7-9981-302a51a191f8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
L'essentiel des tubes de l'été - Volume 1 (25 Hits)
L'essentiel des tubes de l'été - Volume 2 (25 Hits)
Les plus belles chansons des comédies musicales - 20 Hits
L'essentiel des hits français des années 2000 - Volume 2
L'essentiel des hits français des années 2000 - Volume 1
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La grande rigolade - 35 chansons pour se poiler
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 0x6a995c4871a5ed471caf3ed834ea390feea534e7cce5b22c017d5c62e496a421. 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/FRP7P2016060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49cbdd0736ec066ee055e86d5387f79bfccd51f5d62177933fb21694d7f5d81. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:25:03Z), 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/FRP7P2016250.