Jay Ungar (born November 14, 1946) is an American folk musician and composer. Life and career Ungar was born in the Bronx, New York City. He frequented Greenwich Village music venues during his form
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 0xf7759dc8ab9916c094c915ad7ba703bc27549f7f94e2dacbb79278ca657155aa. 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/b8b6fe5c-a388-49ba-8535-e85f3e43f8c3.json and https://artists.proofprofile.net/proofs/artist/b8b6fe5c-a388-49ba-8535-e85f3e43f8c3.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 0xd4c05c83e28121851402691718361cc580e42fcc1b80d678a03b7a35b72ad637. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USAR20700625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c76a922e527a2eed5e9bc9496764ecc226df1fecaf04c29cbc9a8326838853. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USAR20700732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee15e9f00bfbb3d7e966c14139fa4114e8827fd75ef0f3ea83c45a29fe1ba7d. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USAR20700735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0a6c4a3e31bc3a098fbb0458d89bcc37e3f783163afd796cdb2e330ca6b4c6. 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/USAR20700737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b6df6d978edefd2c4fb12d950df09e382b13a2caa2b929a18ea4741d2f8770. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:06:32Z), 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/USAR20700740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b877a65e650e5cd6de350cbb75b0849b08f93a2fd491cfc6f69eddd63f81f2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USAR20700744.
Waltzing With You (Music From The Film "Brother's Keeper")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e67dbdddd1725b2c2de15a34a37729c2ae0ef98f6b81caf2a699d72e158f47e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USAR29301098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf476083f55e7a39e0cfcd97c7ef54f16e9df73cca4b5e6b9c8ca4dee9a241dda. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USAR29301100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1f06c84455deda9ca895ff8e5ed23d0a5de905edca0bb6f0e2344dcf06af3a. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:31:39Z), 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/USAR29301105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05064beb2a166675db1c84b369c488e7fcf7670e3318928db5ad6e44eb1f537. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USAR29301106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf515e9e67c0e005c2c2baaf7b5f923a833b3f6b4019bf02f2ea24d2f7e756fcd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USAR29301110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7877d7c99c88d82cec72ea6fa5293f24e0e34549c81788520385280b57400d7. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USAR29301116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467679005e48bf20df0ab95e709f12e30a425c8250c26308a85cd467ff947353. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USAR29901111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e46dc1fb27a3749d0f8ce180a6f00369e033314aeb76c3d540d334d36da0207. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USAR29901112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c8fc4aa93b5a24744b59e7f28e0e78e92c112aa9a0f9a9d16b5e2740df429e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USAR29901117.
The Harvest Home Suite: Overture (Fertility Theme, Harvest Home)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e73a57bb7f4182df81e5a5bd1338391931cf694bbab7cda89284b9119e985ed. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USAR29901120.
The Harvest Home Suite: Winter (The Solstice, Mardi Gras)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd821307a6c60860cefdce0b0f544394957f14ac7e7f00a69d0b815dda36a71. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USAR29901122.
The Harvest Home Suite: Summer (Wind That Shakes The Barley, The Barn Dance)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d941d339eb2a6b01c5b4b11f648ac9281993c5443a6c78641df436dd312dbc7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USAR29901124.
Ashokan Farewell . Beautiful Dreamer (Songs Of Stephen Foster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71d6dcd42c82d34fc5d3df49df23a72bb8a646408bb73f32b880fefe25e0143. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAR29901119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467679005e48bf20df0ab95e709f12e30a425c8250c26308a85cd467ff947353. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USAR29901111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82072a4f58975c75d70478948cc4f9f3cd66ab80495fdd1a1797a498ed19734d. 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/USAR29901113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40942840634908a08f498fdccddc2994e285355f51d55f4ed1dd98ab93a13d83. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USAR29901114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f8a48b07846541ae5b248e8246166cb8f5dba188d0427dcef2ad7c2b497265. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USAR29901115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e1ae8e838343f9eb8163237abe774ece8efb332cd04a8b599e443821c0fc48. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:01:40Z), 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/USAR29901116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c8fc4aa93b5a24744b59e7f28e0e78e92c112aa9a0f9a9d16b5e2740df429e. 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/USAR29901117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b7e2ed438e98f81f463307ea2c92697306875f2d65a51cdbe4bde8e38e385c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAR29901118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48958d1af6a3c637d98e04b67888fb5a8fd1a5e89f9eb09a277197b68077bdda. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USAR29201094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548332ae4d975b137f663ef0ce6e261641c494da7acd20b6f92fd0598dec9746. 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/USAR29201096.
Foster Favourites Medley (Ring, Ring The Banjo - Oh! Susanna - Camptown Races)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacecd42ac30197e5ed9b500ca6c4d7081f4b3609e04e8f3cdb7a58dc07dbd14. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USAR29201097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084f5fccdc6dd177160397decc9c30125446e8b89bb13caeb10c03c1545ed05f. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USAR29201099.
Old Home Medley (Old Folks At Home - My Old Kentucky Home, Good Night)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaf802439ff5a6824513f020c16e2f062e911177ab8d0ee9be816335cce3c7b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USAR29201101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b80a141ae5b7a9a43ba2b4a509bbf56401086baf8dc1607b8ed0c1e958ead77. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USAR29201100.
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 0x3ad0ab4f621ed444367a906753a2270d6c3377460eafd3b1b8131dca87da98c4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USBC19704130.
American Classics: Stephen Foster/ Charles Tomlinson Griffes / Aaron Copland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084f5fccdc6dd177160397decc9c30125446e8b89bb13caeb10c03c1545ed05f. 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/USAR29201099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084f5fccdc6dd177160397decc9c30125446e8b89bb13caeb10c03c1545ed05f. 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/USAR29201099.
Transatlantic Sessions - Series 1: Volume Two
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196591bd1d5c4467d464616a22a410698d76a52bfbe76d530c701e8a77bd8efa. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBQSK0901611.