Catherine Delaunay (born 31 October 1969) is a French jazz clarinet player and composer, best known as a leader of Y'en a qui manquent pas d'air. She is also a member of the French Laurent Dehors's bi
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 0x8be6c02251a5da47d114893f02a06f5042a67dea8f98f688c98f6dab56dbb29b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d0b93df-386e-4e06-a88c-0aef01789939.json and https://artists.proofprofile.net/proofs/artist/6d0b93df-386e-4e06-a88c-0aef01789939.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xb7689c6a2a3df1fda079d226620ed6929d44540d2746b410cf5dbc483f73b450. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRE7Y2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95dbbdd8404fda78e48b05b1dddd0ac9a86c8ae762f7c02099949858f5181ed. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/FRE7Y2400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5f0c5cb67996492f85060051a53bc3eaefc7c3553be6035ebcd53783858350. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRE7Y2400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaba3f9e3f7150625cf63b360dd19a3016ac500abbc04d27498f885f1da1ee96. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRE7Y2400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d25bbf7c3b057f680559ce1b03f9f218dd49a85c5c7e0808b11570ffcc928d. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/CHE602300029.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae032d042643870fe864570394dfe443973be328c5688327dae82ebd2c7140e. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CHE602300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce49c7c36d526d1f5b026e7fa8b95ca67294076886c7ae2bedcac14ffe1f15b7. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/CHE602300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262a9893237456cd92ab7251d0766e2fdca29e58fd92f1475c8ede092a9b1e2c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CHE602300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2b2f3ee3b2df9ca2e372b2f7ccca1e60dd2ea8e5600f33e6221b062127a6dd. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CHE602300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9212c491155e26e52e84a998f8bfba0f622d743a3e73fca9d0c764a03a21ba5. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FRE7Y2400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367bc62a68e23f845d4267381e51ab43fa9e007921d25a318976d394f349b9e4. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/FRE7Y2400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cc1a51dc0f096d43d44abb0e9ee15fe347efed834ec888b0b1d321ac4cea14. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/FRE7Y2400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590a9a169482dcc228ae166e2ae76ca6e6f8a3073f7e6dc13a20d331f3261ad6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRE7Y2400180.