Sidney Simien (April 9, 1938 – February 25, 1998), known professionally as Rockin' Sidney, was an American R&B, zydeco, and soul musician who began recording in the late 1950s and continued performing
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 0xae548ba55cc7a6a10d7211ea8de111f882a9461ead93d1f6fda01e5af69a25c9. 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/73311983-5918-43fb-8aae-92405ec3065f.json and https://artists.proofprofile.net/proofs/artist/73311983-5918-43fb-8aae-92405ec3065f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Church Street Station Presents: Rockin' Sidney (Live In Concert)
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 0x9d9b71c7f162ee787f6cc6a8a5a7b82054e74b06dc805da038b94ed1db4e0791. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US9390500139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb86030a864114b7e4bf9ffc2cb08c9d55a26e56853a2c48d51de7d40245d071. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US9390500143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7beec87a0cce7359dbe1f39a17a9ff235a716e947ee5eb049c1fb2ed19bfa4. 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/US9390800101.
A Holiday Celebration with Rockin' Sidney
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb86030a864114b7e4bf9ffc2cb08c9d55a26e56853a2c48d51de7d40245d071. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US9390500143.