Isabelle Aboulker (born 23 October 1938) is a French composer, particularly known for her operas and other vocal works. In 1999, she gained a prize from the Académie des Beaux-Arts and in 2000 the mus
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 0x4820b33fe4600015b498241f82b9a2e4720037210f3a2f99453f335ab4fc5c74. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13940536-4aca-4240-a223-419206552046.json and https://artists.proofprofile.net/proofs/artist/13940536-4aca-4240-a223-419206552046.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Isabelle Aboulker: 1918, l'Homme qui titubait dans la guerre
Jules Renard mis en chanson : Petites histoires naturelles
L'homme qui titubait dans la guerre (Les musiciens et la Grande Guerre, Vol. 28)
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 0x4a8a73801b892e44d2a6b2f6d71a65e3daf79a9f455c6a3c3b3a231367caf55e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR50X2418901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9200583c1d3c40639c41d9e61b8d67f7d659421db5e22235068ed8b28ed15ec7. 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/GBBBA0340115.