Fred Hersch (born October 21, 1955) is an American jazz pianist, composer, and a 17-time Grammy nominée. He was the first person to play weeklong engagements as a solo pianist at the Village Vanguard
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 0x0409d23b13b05781975d6f65a25ac871b49db80f0d42108f99aff073848b4239. 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/8d5d43c2-fa37-4921-94f5-577e61e1af41.json and https://artists.proofprofile.net/proofs/artist/8d5d43c2-fa37-4921-94f5-577e61e1af41.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 0x723b1225dd749e5271d2bc8abfe5585a82abd8cbb1395bbd637d8646f63e82c8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEB332379901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596f051defb42092d854736fbdf1705f200b54ef7ad9f5da9a3a1fb760dda6fd. 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/DEB332379902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4065970429fb6594c4ac95829406f559b3a6f0060de31ff4957c375bdf1fa1e. 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/DEB332379903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025f8bc94c2224a6a7d83c5067b53060c5b4281c4b38da408dac999b6eb67843. 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/DEB332379904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5858779f89ba71db16a1c586fe3d166e7dfa53c919c0028be1df508975c20b8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEB332379905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650d14728a4ede6abc13e84d2f9ef76bc568aeb72818ed45ca80e57a0f368dee. 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/DEB332379906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6962ad1c62984db2b67ecf9984346fe52198eb6e0d0ba072f522a22b37827dd7. 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/DEB332379907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d7f5ad618331b407b2001991c0342c06cdfcdb23633a6466be3bc030f47026. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US29X2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf695151cbc23eede0b69126ba2660d6f64d91b45371609847ca324aba5b74de9. 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/US29X2200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a11c12281de6e398d8e9ee45a61d5867d81cb859015ed6c24d37c3e2c4a7481. 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/US29X2200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489ccbecd4a502c5b134f44a9587a0b7904aaaccba85f164e3511330ba8a3570. 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/US29X2200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4494e99deca3fcb559ca7cb90a538217fabad3be675154ab0055aaaa5084e404. 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/US29X2200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1e2cc2eb65a0b49dc40432bb3657bd157a2af03cb46449302342609af3da8c. 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/US29X2200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4668ba81c30a2d8a11b9424218fed7e3fb3c230dbee5c675babbe6b5fa9271. 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/US29X2200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5226fc31f8d507d564b9126dd9316d02090e544481aa6dfc650711b75c664a. 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/US29X2200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcaed7aca1de09506380d859052bf7173a8492442402e848d927e75bcb315b9. 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/DEB332174601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6952389f42be7cbe67e066b9db50364fb1856f53eeea49ec6dbe3c3979c12e66. 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/US29X2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d08ed8b9017a3a75c5deeab56ddcaf6c4d763f75747c66d43d05adf6fc3363b. 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/US29X2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50b1809407e077442f86f726f3512867d2c5a4a0142ee4a3e21deaaecae856e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:10:27Z), 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/US29X2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0ff8e1b7460ca11402960ce1f9a7c8ae64097b95b30abf08afa8db7f0417e0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US29X2000020.
A House Of Many Rooms: New Concert Music by Fred Hersch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0806e9a18edb520d02f6007c21c82bcb29065e6214d885954a70b149e74185a3. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:15:25Z), 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/US29X1700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61f0fa891f1c8af8733c433e92d70310653836e00bcb419d312df72a2129ad8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US29X1700045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7761dcee159f43252784013879a0bcfa1eee3b780ed20d8f7f6c7016f6dc5b9. 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/US29X1417171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f6d80fb44610de2b7b1ac8033b598648dee16698903a3bb49dad33c617aa09. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US29X1114701.
Volume One: Fred's Songs / Song Without Words #2: Ballad
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332d1e6c5f007bde99a2a307baab9bf0bdf8cc7fc4e6db51b4b6c901eb7a9a63. 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/USNO10061222.
Black Is the Color / Theme from "Spartacus" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269355fc7a96b9f42ee3feb2b67e74eacaf4747d46f05c7a825504f69a86b846. 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/USNO19955801.
Passion Flower: Fred Hersch Plays Billy Strayhorn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e53ff84a049bfa1c410b390fdeb8aa5795d316190ef110d7fbddf38291697e6. 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/USNO19639501.