David Schwartz is an American composer, known for his scoring of the music for several television series. He composed most of the songs for Arrested Development, and he returned as the series composer
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 0x4ca0253f3581e188d7eac8cb1c07fe16f9fd42518821523ee08c7ff6f5cfa988. 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/8844144d-09f7-407f-85c2-14750bbaaf94.json and https://artists.proofprofile.net/proofs/artist/8844144d-09f7-407f-85c2-14750bbaaf94.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
At Long Last...Music And Songs From Arrested Development
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 0xc1915f2b1bf3a7b908f1d1471aa02fa99c73845f68c88660cb960e5e70494031. 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/US3M51323302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8d848185533103be80015886b5833118110562ced8758e71f8a908a43b106e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3M51323303.
Sound Of Silence / The Cockroach (Medley)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51fbeb061a270b7df4852a9894402ade1d5b42118ce0c4a738730dab7372672. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:17:24Z), 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/US3M51323305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3910966e16c3d08e5d42b25d59658b9a88826a7a4a77f9b860f66e5ce9c7dfd8. 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/US3M51323306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6239df4a50e1782a0b843f44fb8c313aaf44abb5eae63861b2046e9465f15dac. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3M51323313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8c701cd423d7c105d8a03e2481e1ff440300723320c305ae9d35ce4b594ebe. 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/US3M51323314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0e684d056af3b0c56c90291c409cb64fb18d39c07f24ea17f0b2675718a432. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:42:40Z), 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/US3M51323325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53d34985ceb679bd3fb69588e7757e8c08ded96ebc487074ffe710af77c4ff1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3M51323337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf773e56fafa3201b06afa6b6f12c3436b7e78d3a61af720581a89ba23a2255f0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US3M51323340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb566679b3f645c39d94b05e6d76cd120d3c3ddb0d6f75ebea7d2a7673e6f66. 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/US3M51323341.
Lucy and Desi (Amazon Original Motion Picture Soundtrack)
Deadwood: The Movie (Music from the HBO Film)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63caf3e0e17478dac31f344383664774db878c97159369b018f482e047eac7c0. 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/USNLR1900279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9138b30788923a60a87f2a1de34523be57935961d71d7d2a923372984924a8a7. 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/QMDA72179728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bb65f76f9ece367bbc58b6601ce5d955e442e7c7f8422668416670c9f4ab13. 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/QM6P42190868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe808f2c5b450d25c37325acbda089b10a9d0911541270abbceb73a59bd5ab8c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM6MZ1557008.
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 0x73c66c304b11893d25508c3f90ca562c5ecae22312f6050a1311ee8c8cef25dc. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM6N22234191.