Chad & Jeremy were a British musical duo consisting of Chad Stuart and Jeremy Clyde, who began working in 1962 and had their first hit song in the UK with "Yesterday's Gone" (1963). That song became a
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 0xdc5be268a85bbe81a6667c48619b2d9a10a32b1f9a5e1224c0bef8ca0882f85c. 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/6f2c7ada-b9ae-4b1d-8d19-4dda7d7dc86b.json and https://artists.proofprofile.net/proofs/artist/6f2c7ada-b9ae-4b1d-8d19-4dda7d7dc86b.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 0xdfb3dffd2987964aa4487eed92818049745c8349a0a757e88372a33e94818592. 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/USSM10310232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272a633ac2106ee0311c8c9cf46231a07e69acc4c7b715d7a8d6698b95dbeb61. 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/GBBLY0604533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650d86b1bcfc57aa94e7556779cc5f351d96fd06a6948f903467fc401416eb77. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:36:48Z), 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/GBBLY0604534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce0f709293d536f8190ada12ec8489ffa6fecaa909f067c65fc19e3623ce3a0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBBLY0604535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31a2c3d58c10d4175c759e11acc85393941b3b0384bb9ac72a9feef2188356e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBBLY0604538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9625561a7b1dc45858ce55b5ef61bbc49a358320d280438bfff025c23d6165. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USSM10704962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a431afb390d11bcd900b3db9ac9ed6f4e19570d7900eff92b0c6846e7e14cf4. 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/USSM10412356.
3 In The Attic (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8a82b94eab7741fe3c087b5b1f68150e048dcc2aba47079fc4822f5f4bdcbe. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USCRB1209992.
The Essential Chad & Jeremy (The Columbia Years)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39769f8f3a593a6e4cce771ba2ef70ec4d3c487c61ce2052b8982c8250cddc83. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/USSM11607089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b3e122d775902dcfb004a8d95217499f8d40f29b8708e5c64434721ec57db8. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/USSM16501016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1248086d09d2e31804ae266582a6e405a32a02bcb1264665b249713bb64264cb. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:02:39Z), 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/USSM11607090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77df8ba8dd15098e3193d557e6cd24935d701b04700295a3f35c8928f7d6f52f. 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/USSM16501011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57d59525376fa42790b08c33d4d10587a3c8929633978af00f27d2f76a8f5b0. 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/USSM11607093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1b9e4393ffda70702d3d2efd08bdb892a9ef7de1b3073e46428c5fc063dcd9. 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/USSM11607096.
Sing For You - A Golden Classics Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3912e4878811edde0c63e5a4a11a7d2353c961ac13d2f439da4025b8fed2b80f. 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/USSM10114257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac831f22368a92f224e6500a1a400609f68d2a367b65f0a95cc33af6fb3453e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USSM10704961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9625561a7b1dc45858ce55b5ef61bbc49a358320d280438bfff025c23d6165. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USSM10704962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8f8946d07d89e150d220e39c8aab774821bf0a8aab947a44ea387c231feb48. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:39:19Z), 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/USSM10704963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315620a3b3e141e4088fd830d942574241eea7d127f44a9b47c20e8648ad4e58. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USSM10704966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5172318e8b9ce064100968f10c0e8a32ac9ccbbb0058b5a50e03e205bbc3594b. 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/USSM10704967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd413df0ed1e1af26b0690513887ae50e5b17aed09ced799af5fcf460df6a3f23. 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/USSM10704968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a431afb390d11bcd900b3db9ac9ed6f4e19570d7900eff92b0c6846e7e14cf4. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USSM10412356.
A Summer Song / Yesterday's Gone (Rerecorded)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe30331deddc2ede900ee03f6d6810b7bd57609453a9a288e5c496ea578f6ca. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBSUW0702259.
Paxton Quigley's Had The Course - from the MGM film Three in the Attic
Quentin Tarantino's Once Upon a Time in Hollywood Original Motion Picture Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f88bb4d2a2afcb5dc0a261b913155aab71567eb8efe45c9fc7bc738029af2aa. 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/USMG21900057.