Nathan Barr (born February 9, 1973; also known as Nate Barr) is an American film and television composer and musician. His television scores include True Blood, The Americans, Carnival Row, and The Gr
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 0x3c3bc8a6be80044d73e8749b018efb0e1e6479a537cd31e0649a1a74c48d105b. 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/3fe8e9da-0868-4327-aeac-b086d34f36f0.json and https://artists.proofprofile.net/proofs/artist/3fe8e9da-0868-4327-aeac-b086d34f36f0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Diplomat (Soundtrack from the Netflix Series)
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 0xb88f1d5c0e1b7e5c6d29355d4ae18776070f8d872819d2ee79e86b2feb3682f5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ8BZ2304930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4c0e0ecf027e04c628689a5d59af2280fadcaeaf25e03ca93c2af90473d3f3. 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/QZ8BZ2304931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3ae52540954e069780f0c43f58e13ac72ead9020d91b51f347616824a4745e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ8BZ2304932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52751c3d23ce3afd58113039d591027035bc7f8f460bde10148737362959bf1. 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/QZ8BZ2304933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7666db9fcedcd659f5a1501ba6e1be8257f923a1385db39c4b0caf8930d51d. 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/QZ8BZ2304934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6ae771cea8c94e4f1bce8e992ffbf7823213bdd322d32f709de5fc63eb83fe. 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/QZ8BZ2304935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dceacec8697f3f157637f13b8202b615bbe142b35106580404e2f7d4f9b1a0d. 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/QZ8BZ2304936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95bf85d52504870780e18027af10f398a110deb2209567752622011883b9f26. 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/QZ8BZ2304937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db12f700cdec2d648752f5daca657859578dbd07d7be288501e5881796d9219. 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/QZ8BZ2304938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42250d4799ab8e629c868f0102ba6d38c56e2042576c902119421d66ea6f3fb5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ8BZ2304939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70d6309761e7aec9595260af03359c92b4303689aa9fa57e723468013d70d7d. 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/QZ8BZ2304940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf220cded97ca444ef71c16c01f5d538c97857c224dbb35543052b7232ae2ebc3. 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/QZ8BZ2304941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13e7fb2c503cc1334edb6b6331d47a8196448f20703218413a87a0154199674. 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/QZ8BZ2304942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf57cc764967dc7d181305c7817639cef6844bf4a33fb095dbdcb8ce897c4b4. 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/QZ8BZ2304943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9b29f0e89c7b1a86b00b515748377f1b4aaf802da7030fcf981b40300fbaf2. 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/QZ8BZ2304944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94dc373f0abc58dcfa406227e0f1377fc0a6fe384b48e90f5dea08cbf8c1d75. 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/QZ8BZ2304945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896e5ce311aff4d905b944ed0806f4e17a5f10bce67f2837de8ddddf08af2cda. 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/QZ8BZ2304946.
Carnival Row: Season 2 (Music from the Amazon Original Series)
The Great: Season 2 (Original Series Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a6ca26ebb8f9ac4fac0131f61c1619e0a7b77a30b5e8913950d386d3f8728e. 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/USLS52216906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5066664f0fe5203ed64b41994099b4ac4b21a3f4c63cd8e5007b550e2166b73f. 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/USLS52216910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30acd77a3b1d19f9bc5b32b3d5a4d8b4d87641d7ad07c8c98a80d9530dbe77ff. 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/USLS52216922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5885543f66e466c7827f5b15e18e1b58e61c27dfcac452b630d582550b66427. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZ8BZ2100205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd995588f6a3f1aaa52fb8db7d03fb0e6fadb7fdfae19a84ac195a0fe74d06f0c. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:06Z), 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/USLS52066401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c6950a83a3598793e40934f3b7e9aa809f61fb1fc871cdcd4cfe17da26ace2. 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/USLS52066407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeb29147ff224b83ca32deca37b53d0fa172acc120b94f451d83729efc58efd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USLS52066411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ab75409f4a83d2635aa254e657ad0c1601fd55396ee25f0ceca612a3c6db07. 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/USLS52066425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd2635999deb82ed10767c56dca7cb3f0a8555573cb385ae0dc688fd6a7142c. 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/USLS52066426.
The Hunt (Original Motion Picture Soundtrack)
Sneaky Pete (Music from the Amazon Original Series)
The House With a Clock In Its Walls (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ce1b2a2f4e5fa4a7c3bf105e57da0fa212487846ff5eee7489b4f2c5730e8e. 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/USQ4E1803987.
The Domestics (Original Motion Picture Soundtrack)
The Americans (Music from the TV Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c0c59f59e04fbb7af3eca741466f6b2950cf261937866ad030f54f17b4fa5e. 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/USFM91400079.
Flatliners (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44362cc48c1c496af8fa1c3e2f1efbbfe847cf0effb860e39eab465e3f8de985. 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/US4DG1700665.
The Boy Next Door (Original Motion Picture Soundtrack)
Hemlock Grove (Music From The Netflix Original Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca94449a3ebfe45af56dc973bfd81a43baede82711fc9d1215f78bbc3960ece. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/US3M51321701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2f089dae044d4c9c8a72ed9419a3a91176e2f8844e52d479f0395c92e71a98. 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/US3M51321704.
True Blood: Season 2 (Original Score From The HBO Original Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da58aa575d8a0c5b0c2bfbbd1b9e9a7e66122ad4376e793ed0b65e6ae04b7a7. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/US3M51004401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b272ca104f868c06b17c0c38079f5c6f7766e6e8906a21eb0d1f9b55b1ad42c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/US3M51004407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047456a37a25265489e004b3937e083861fad922a41f68d2831c47123ea8842c. 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/US3M51004413.
Hostel (Original Motion Picture Soundtrack)