Sanford Clark (October 24, 1935 – July 4, 2021) was an American country-rockabilly singer and guitarist, best known for his 1956 hit "The Fool". Biography thumb|Advertisement featured in Billboard ma
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 0xea275fc2580dad3e49627f90b9dae90834f2c35c78cdd2a37e43a622ca6d265e. 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/ddd89e19-c7d3-43e1-9e03-2daea18957ad.json and https://artists.proofprofile.net/proofs/artist/ddd89e19-c7d3-43e1-9e03-2daea18957ad.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 0x3cf4036894ec66bef2d788a5233d5f2bdb44d4a79f056961add18b075f87b1a8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEXO52457091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080e23d4af82a8f45e0f41387aa1b7771a9677dc5f176755e8ae978490854ac4. 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/DEXO52432843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4bb05cb1e7cc30fb244a293d7677f229ab4e2182bd8e6c54e3bb17274c49a5. 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/DEXO52432845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433a6ae2832dcf84e93c4b79dfe349be5f979902131619e83e18bc9ba7641fda. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DEXO52432847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38a5e5a17dd4e319148f4e0175b00bb2b12f7118ad12b77fc5aae27e3e08fe3. 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/DEXO52432851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7318cbed3d76cf50df711ac0de192a0073752fffd536dbfeee033c5287dc42. 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/DEXO52432863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2c98516665737982ea3e2268725fcb4bbb441afc8b0c6a0511b9bbba729fb8. 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/DEXO52432864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468627be12f31380a7c0c72e55e5e0dc169606a622989918302eb1451f941df1. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/DEZZ42171841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fe78b7db1c9fd5e4611865eb99830e6c77a937b49361d0675ce2de01223173. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/DEZZ42171844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee2247f70e437a1d463d1bc586e6504d515c38b0f1164b4000a55e615a943c7. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/DEZZ42171851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991daae9b3f53006bf3c5e4dc7aa5dcb67e397a8226c44d7018ca3f24f05270b. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/DEZZ42171855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7caaeecbef71b3d65f88f784c770dabf4da3967612351fdd867c4b0f04841502. 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/DEZZ42171872.
A Cheat / Usta Be My Baby (Mono Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4116c2f7c622e80a82f10e2bafceb021fe1ed1a711c0a1fbe783566216acc8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA561056561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a798afc5cf037ecc533abd85140f33de4d86df0ed8d7565c3fcafc7cfd65a0. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QMFMG1529695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244ed0e0e80e7ee584c2dd2dbe73243ec7875121b8d735541910fe419fcd0872. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QMFMG1529698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c33926b4c4e90b617b876ce4f24c373cc2fa39919039c32c6f2a8aa6b81d8ea. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QMFMG1529699.
Top 45 Classics - The Very Best of Sanford Clark
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0209a519a379e6bc50b3bcaa9b874ea8c1215e9f752ac05ce552e686cf3b4b83. 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/AUXN21914822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda707ec5c3ea063cd3cc728dc1da937e8e698a60436058f3b1b977ed640fa858. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USMC15609216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04d6abed412471098fdd4a0462ea3e725732c97e6a2bb032740927048e536a0. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USDEI7603973.