Castel may refer to the following places: In France Castel is the Occitan word for the Latin Castrum (small caserna military castrum) and occurs very often in southern France toponyms especially mixe
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 0x35707eecb9a15ec13a8a97bf6afe19c889c8b54ce1fc15d92fda05986031f474. 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/bf45d215-f5cd-4eaa-b0b8-6abd4418cdf1.json and https://artists.proofprofile.net/proofs/artist/bf45d215-f5cd-4eaa-b0b8-6abd4418cdf1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le pain et l'amour (feat. André Grassi et son orchestre) [Mono Version]