Paul Arma (Hungarian: Arma Pál, aka Amrusz Pál; né Weisshaus Imre; 22 November 1905 – 28 November 1987) was a Hungarian-French pianist, composer, and ethnomusicologist. Arma was born in Budapest in 1
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 0x681e6a7a61569c13599d8232d068c6145e010a0fb33b1d569a681e356c2f0fa9. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/191b62e8-75ee-4313-9c97-b2833d69b9ec.json and https://artists.proofprofile.net/proofs/artist/191b62e8-75ee-4313-9c97-b2833d69b9ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Arma: Suite paysanne hongroise, Op. 153: I. Chants populaires tristes (After Bartók's Peasant Songs, Sz. 71)
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 0x38e16f14051c8f7b3e84697eb306d23284b375cfab54a05ac66a2178378edafe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBAYC1500430.
Arma: Suite paysanne hongroise, Op. 153: II. Scherzo (After Bartók's Peasant Songs, Sz. 71)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf9752c4a2e5e9772b5a797a0409ee4d8973c2d9e789a594021d86c4667b292. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBAYC1500431.
Arma: Suite paysanne hongroise, Op. 153: III. Vieilles danses (After Bartók's Peasant Songs, Sz. 71)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98de2ce34b97d10acec917da8d7c18fc533d7be9813782f27822a04546b08521. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBAYC1500432.
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 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
Suite paysanne hongroise (After Bartók's Sz. 71) [Arr. for Flute & Harp by Anonymous]: II. Andante poco sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde2ada413a9083f834fa82b36196c29baaf8b9cad8fd5b5172ff46b9d747ec2. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBYDS2400296.