Warren Harding "Sonny" Sharrock (August 27, 1940 – May 25, 1994) was an American jazz guitarist. His first wife was singer Linda Sharrock, with whom he recorded and performed. One of only a few promi
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 0x126ac4a58816adb7106b600cb1d578a72ce47d05737ff30d11c1ac0fae5f8ab4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94e455cb-38bf-4e35-9b95-3846858f1e7b.json and https://artists.proofprofile.net/proofs/artist/94e455cb-38bf-4e35-9b95-3846858f1e7b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e9110f40c439815ee13414e649768ee3116e8e2c84a86ff223aa7f36953779. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USAT20505252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692d13394c8efa4553e0582a2ee96c325e86461f8799fd73b924071221290beb. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:30Z), 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/USAT20505253.
Portrait of Linda in Three Colors, All Black
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4589a42ee66591796036e7d9ce584d85c5716070b332ee8f372302ca8c0ce2a2. 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/USAT20505255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9146a501d1e9fb708a57265d629844e9ec7b674c220f92fc1471a53a618db973. 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/DEAF75100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cc6d2da779725a23e7e3cf92d44a32bfdd72f7d0a01ea4350785da60ce4acc. 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/USDJ20201018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2dfc40843c613ff6a1642992bf8742a6e1700b1f898bc1318611d991ef8eef. 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/USDJ20201020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba68e8e3f4dba466b9d7464726d443f287b176d1cfa286e721c4a340ee5c9a95. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USDJ20201022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c07bbb0f5f7f081782c12e42b95bec3bef35d424b2a49d88132a77afa3b2a4. 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/USDJ20201023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138ae477a44cab3b4c623bb4cb5237279c731badb3d558c4820ac613ad4cb6dd. 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/ATD411409001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cfac774a5cfab86a40b9914355745f45b1294fb4119bb1d9b2f3aceca08fa3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USHPY0700079.
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 0xf9d5a231e506c01c3e7894351d3fbbcddc8e64790a633e3c8c028a2de1bebcb3. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USHPY0700085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db8df5b6e41fef193d7e770ebb3b08fafcf9450aa09219e95a78e33efb7380f. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/ATD411409002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf024183f78e82892f3032d8e720df7d78e5583cd60ce1409d37d758fbd664b4. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/ATD411409004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6ec3d79a0c517b59d96349d9032a859772ce8b374c5c6dc8167f4967b2d3a4. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ATD411409005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084b5d05b453e07e9656c5b5706a4dcb2946ad7e2f10471c605964ed8001b1ec. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ATD411409007.