Anat Cohen (; ; born 1975) is a New York City-based jazz clarinetist, saxophonist, and bandleader from Tel Aviv, Israel. Biography Cohen was born into a musical family and began playing the clarinet
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 0x1e3cc8840c185e616ed8e2833f5f0e20d50090622805ff5e92336ad4e7ecf55c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b07a638a-a425-45cd-b331-e116d90c6cad.json and https://artists.proofprofile.net/proofs/artist/b07a638a-a425-45cd-b331-e116d90c6cad.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 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 0xe676c68f026100ac5da4b1430c26223ce9399c3e1979efe17acf7243ae7b64cd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USY870900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf124fb258bc8747dab484c835fdf356e50e5bd92fe99ee1fd594bf8e3814d168. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USY870800034.
Clarinetwork: Live at the Village Vanguard
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61737716c3a026f71df0709e9419ca61d2169f0c2e83a586d47f858c753afca. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USY871200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f56fd8048808bb91ef9c8204a695d73b76c56ace17016897c697663c6d3c34. 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/USY871200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7547dd1ee1d1824584434d8d6212f51cf5d5cfb0ec3afd88192e630a61d9d5. 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/USY871400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5736a839dc11ab4c34e82e0351eccc3abbd987e2b9eb697b7f822b4796659b2c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USY871400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f98d21bbcac7ff8a70adfdd990180f7c2eef44afc7941f988d9f50fd33e870. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USY871400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c3273858ec9d1259e766a9e1bbae01862d605e46e2ddd781436bab0c58b21b. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USY871700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4a023fd82543a289b4ba3cc74d73323c447022db2c7e31a643e8f6989efc38. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USY871700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae634d4a816159a1919da7321d7872f8a4fc6120cb6069f019820dfa65bdabbf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USY871700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d0990932ccdde8dc96102e6d09a872f09093c29b3910484be9eff4757b2812. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USY872200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422c3ad9521d4275e77ff00c9be28dd7e5b47034166c4ecb81d7f74050452072. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USY872200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda47055db4a02f59b62eb8a7775d19ab347eb98444235968e5305ae5b015dfa. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:03:13Z), 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/USY872200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d0990932ccdde8dc96102e6d09a872f09093c29b3910484be9eff4757b2812. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USY872200019.
One Hand, One Heart (From "West Side Story")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5288fa4569184af445a2836df4b50c30f23a5eaa454b3fd04010001c9acf9d0. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/USY872400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295de776c97476d9ca0fc46210bc15d2a2157641caad8ea8e8497efa58a87ff7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USY872400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc123b49fac129e209925e75520631f5e62d7039c5e7f8b5befd6b7929259c009. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USY872400034.