Gwalarn ("Northwesterly") was a Breton language literary journal. By extension, the term refers to the style of literature that it encouraged. 166 issues (numbered from 0 to 165) appeared between 1925
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 0x95cf2e94d5ab421756b50ec4135fe8b03abf173da1da4713d8132acbaad8eeb7. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6ff186e-5a57-4f27-8d5e-d26ab510b82c.json and https://artists.proofprofile.net/proofs/artist/f6ff186e-5a57-4f27-8d5e-d26ab510b82c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A hed an amzer (Breton Group - Celtic Music from Brittany -Keltia Musique -Bretagne)
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 0x208c683c235b336204242f2d2ca57134e80f86da7ef3d1b9bf6b0acaad1682cc. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FRY479001006.
A raok mont pelloc'h (Breton Group - Celtic Music from Brittany -Keltia Musique -Bretagne)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232878a35d81f5d8d42a2285b3f73e5b08280a43c71e5abf31a6886013ea742b. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:28:16Z), 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/FRY470010602.
Karantez Vro (Les Musiques de Bretagne - The sounds of Brittany - Celtic music Keltia Musique)
Brao Gozh Ma Zadou (Les Musiques de Bretagne - The sounds of Brittany - Celtic music Keltia Musique)
Brao Gozh Ma Zadou - Les Musiques de Bretagne - The sounds of Brittany - Celtic music Keltia Musique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e24118cf1080a6d4ed46690b38cc684f1f5f9c606182edabe67503002e7529. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRY471100101.