thumb|Pascal (2002) Claude Pascal (Paris, February 19, 1921 – Paris, February 28, 2017) was a French composer.Marc Honegger, Dictionnaire de la musique: Tome 2, Les Hommes et leurs œuvres. L-Z. ed. Bo
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 0x5f362a8b3e5be3a2ed2e00be4b4fd0440cdbea5f4b2e268e07777bc7750ecf04. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33414933-08b8-4c47-90df-13dd0a327f0c.json and https://artists.proofprofile.net/proofs/artist/33414933-08b8-4c47-90df-13dd0a327f0c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pascal: Concerto for Harp and Orchestra in C Major (Digitally Remastered)