Crosby & Nash were a musical duo that maintained a separate career in addition to the solo endeavors of David Crosby and Graham Nash, and separate from the larger aggregate of Crosby, Stills, Nash & Y
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 0x187561da7ec64b70238945fb995d197d48dc2f7ce141a9cb078c3bb5d7e86ad4. 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/dae08dd1-e9fb-4fa7-a857-6cb5359e46e9.json and https://artists.proofprofile.net/proofs/artist/dae08dd1-e9fb-4fa7-a857-6cb5359e46e9.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 0x36956b50e32bd9cc48227be587206d9b502b621ea2425c91ca2df16f34efa020. 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/USAT20105609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbabf2c3ea268188c9286dc5ee71f154a1742599ee0f4141d0915b33c0894a80. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USAT20105614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd544b3f1f6088395e48b3b1fe8d0632cf198d9134c39760326410c3adddf7001. 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/USAT20105619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc70d1c3341cbc1a4443cce7e887ced74377d71893efca6c0e0fb2f43657106. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USAT20105633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3a9a384ae4632dac064ae969a3807ba2c78185bcc3cc53df00a725b4e8fe08. 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/USAT20105635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584fc5b892b5453a869679baaacf526f4bae9918b7387be1f83130d8b4e76254. 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/USMC17546551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949fe2f4b17e6be5e0b8260175722254bbae39a2869a97542d9ea9c01437007f. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USMC17546552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90e012afbd91a8730221db9df281ce33536d7eab05fafd974d8b71a9f501cff. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USMC17546553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f883ac946cb7f561d26754704cffa171f1cec581544680d6af362c1b4b6c236. 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/USMC17546554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177294ca21e670d90d1ee6c76789bb027074329e8bc2bef42bd104296dba51f9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USMC17546555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccc5c24e6cf916eb10a25a643ca1d6e7af4af8d3d1b53e3db7952d753c26f68. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USMC17546557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2a01c24de21054697f98090d6bb204e18b576b756d99795b77571690a14031. 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/USMC17546558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b5d5e160dac9b9d5ce483f4a7808f191e435d4f9ac6849e6987dcbcc08f081. 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/USMC17650852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7a1330bb5d6489c6bd64635c5d694465fec7f65e139690b9375492b6a22126. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USUMG7710001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd319acf29c5fb363ecc31f3450574dd41f6d520e5f8665dfc1b785a6c997c67c. 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/USUMG7710005.
The Best Of Crosby & Nash: The ABC Years
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7932c057138a03c96a4333327ba8f565855e06713e853bf361bdc62f00671d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBAJE0400632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6871c49ee3f61933839c20b7c3bb186da68fd6367154a3b90b2a2460f456fb. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBAJE0400633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988376580e28c59ea4d284ca6367e29f4d2bd7e0b9bb17ee50823bd7c6d7fe82. 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/GBAJE0400622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e2ef063b3632caf4424f4218493af8a8b29ff3d4ae8233d85dfcabc515f467. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBAJE0400634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3060c4efff17b3a924f07d067800cdf27adc265544078d314ee24fdbd6c273. 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/GBAJE0400623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f43b21b4498aa78ab5080c1d856bc0eb919faed16170cd73299daf075bf604. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/GBAJE0400635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cd6001c11a24083ea9243051db01934b6fff12088a8fa5661b83f63ae7f15c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBAJE0400624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff853f1ba59eebe5ca4a03b968290ff93cafa9f19ec3c47c2df9f999ac6ab7f. 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/GBAJE0400627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dabd076ec43f69de61e18c97c5706603b7c55ffd2e8c53eec054ecbf280e00. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBAJE0400638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4438ca073ddc7941adb672de8424ce9517176b898740ddf22baec13ebee02b87. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GBAJE0400628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b6a5b0aa4ac18b89f0e69d2e527967b0a604b35f8f2feff304e9a1ecdebca7. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GBAJE0400639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863ae1c1a6914ab24df0450eead181c9ce6dac59623d267681fb3eb0c0a86e53. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBAJE0400629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1212c3048fb2403301728b27e398a3b761ee2cd31025529b9ad2575a1340282. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/GBAJE0400630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47cb6d44f1cc01834b1609cc813646845563d6691f86bfd07b9e8a76d3e4d1b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBAJE0400631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d458c91f7c8966015f1d5d8627b1e6eed0a43c3732f08d2c3e3aade28b7839d. 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/GBMEZ0832318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3d0c4a859f28dd66eb8f38c7a469490972f9b2aee45b7e3bfd1c4273fed665. 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/GBMEZ0832319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cad8e7144471099c309a79040eab0c52cbda62dac53a2a6ded1f92ca1e140f. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GBMEZ0832321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae27cc999bec957564a0d7df15b586d2a69b1fc36cfba97d2e51d7758aa1e073. 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/GBMEZ0832322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe113e12c2499ffb1fb84439bab4076ba540d897a7d4eb183684b6f1a3768608c. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/GBMEZ0832324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229fe6a95c6e8b13c172730140e14b596a444d01d47cad67992eadf333e32bc7. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GBMEZ0832325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d561ee8de9d5089db68ca54409307589f2028fb9ea7e92a81683a3ccce7a582. 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/GBQRF1011151.
Crosby & Nash Without Stills & Young - [The Dave Cash Collection]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ace68f2e004ca438b459d95259298dff8b8f0458433feec9b4316899f9e70f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USV291380344.
Everybody Grows (Live San Francisco '72)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a0d4d9f60e2bcaab0f94cf0f0849b885d068fd909849db8ff081f04a1254d5. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GX5MY2497625.