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 0xb6753153e5c7c0f864694e2f568f6767329e07145d71edbda850f91253aac427. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5370960-be0c-4ed9-9a39-3cd9fed4d00a.json and https://artists.proofprofile.net/proofs/artist/c5370960-be0c-4ed9-9a39-3cd9fed4d00a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nairolf - You Know It (#1Son1StudioCLip1Journée)
Nairolf - Frérot (#1Son1StudioClip1Journée)
Kosty & Majis' - Pilote (1Son1StudioClip1Journée)
Niakar - Une vie meilleure (1Son1StudioClip1Journée)
Ziguy - Not Running (1Son1StudioClip1Journée)
Tigun - Vie de rêve (1Son1StudioClip1Journée)
Zion - A toutes ces femmes (#1Son1StudioClip1Journée)
Nairolf & Nay - J'me balade (1Son1StudioClip1Journée)
Tizier - Dualité (1Son1StudioClip1Journée)
Taims - Soldat (1Son1StudioClip1Journée)
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 0x860360b87669fcb29035647c9edb7dd4e1060621b2feb850f6903650cb990ae9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTB52245120.