William Perry Jr. (May 31, 1965 – August 7, 2023), better known as DJ Casper (also known as Mr. C the Slide Man), was an American disc jockey. Born and raised in Chicago, he was known as "Casper" due
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 0xb59f693d469c755d2d52f82e950d57a3fee1770ca201bdfe5dcea5ee0950deba. 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/f72f08b9-aa86-43d3-b21b-3892684d1544.json and https://artists.proofprofile.net/proofs/artist/f72f08b9-aa86-43d3-b21b-3892684d1544.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cha Cha Slide [(Original Live Platinum Band Mix) Short Version]
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 0xd92d92dfde295042744653fe4add94efa23678da65629e1eeecd8807b3e884c5. 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/USUR10400187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f420bf22eca1db9ea9a0b00dc1cd1953a4ae4cad62c0020f101268e41756f3. 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/USUR10400190.
NOT YOU PARODI BAYAR HUTANG !!! DISCO TANAH SLOWBASS
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d01bcc778b79996ddd9f105cfee4f4f4bcca6f5f05598275268bd5c233c9a4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USUR10000987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd626cb39aa5d1a415fe8550fe08312cb9818f1cccb0c81b3a7ff3e1c2d09b780. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUM72203524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8150af9af18d290c6796d9245da3ec3c9f55433e443605cb7cdd9c1f2cc9cfc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUR10001294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c63eabe7823a0d2339f62d0b5a8a932b3f4436fecce5ba45bb186a261b29376. 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/USUM72201791.