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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfb6baf5b39f1ebe996d248303839e7c15dc822effa9caf9f8cc3efade12c2d. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3eeb06c2-fb99-4f12-9349-009592c3f5f3.json and https://artists.proofprofile.net/proofs/artist/3eeb06c2-fb99-4f12-9349-009592c3f5f3.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
À l'encre du coeur - Vertige amoureux, Pt. 1
À l'encre du coeur - Vertige amoureux, Pt. 2
À l'encre du coeur - Vertige amoureux, Pt. 3
À l'encre du coeur - Vertige amoureux, Pt. 4
À l'encre du coeur - Vertige amoureux, Pt. 5
À l'encre du coeur - Vertige amoureux, Pt. 6
À l'encre du coeur - Vertige amoureux, Pt. 7
À l'encre du coeur - Vertige amoureux, Pt. 8
À l'encre du coeur - Vertige amoureux, Pt. 9
Un Noël Magique : et autres mélodies féeriques