Roland Becker (25 August 1940 – 2 March 2021) was a German politician of the Christian Democratic Union (CDU) and former member of the German Bundestag. Life Becker joined the GDR CDU in 1971, for
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 0xfef3bcb52bdf3093dee771ee1a5a3a485f27d0a7ef70d07f36a987929ac3d06f. 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/de9c3286-35c4-424f-a1a0-10c40f5b0e3c.json and https://artists.proofprofile.net/proofs/artist/de9c3286-35c4-424f-a1a0-10c40f5b0e3c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Musique bretonne aux confins du 18e siècle
Fallaen (The Milestone Collection of Breton Music - Keltia Musique - Bretagne)
Musique celtique: Envie de Bretagne, Vol. 2
Fest Vraz / Musiques de Bretagne / Keltia Musique Airs
Musiques , chants et danses de Bretagne (Celtic music from Brittany - Keltia Musique)