Preston Oshita (born June 26, 1993), better known by his stage name Towkio, is an American rapper from Chicago, Illinois. He was previously known as Young P, Preston San, and Tokyo Shawn. He is a memb
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 0x4d4832fbc0c950188eec17da24719b0be3513f672cab7df0670ceb54ec8673cd. 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/6187fd20-ea9e-4fe2-9d62-a76b80911d76.json and https://artists.proofprofile.net/proofs/artist/6187fd20-ea9e-4fe2-9d62-a76b80911d76.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 0xb7f752fe26c176be61a3f972303c78070bfffcdc0825bb93d85537867dcf6b2b. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/TCACM1654948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532a3b88973ca709a1c4a501b75224de1347023c49399b36d8e381348210b878. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/TCACP1694648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678cf9fb8b8b9f4699c827a140d2be1c95646dd47f893fdc63bd975e114cf077. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCACP1694649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2127ced4dde69ad39eaf87400c1eeb4376bbbcfe4ecb77cbfefd8d57963c648. 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/TCACP1694650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a084ec321e4d744b1255deac52ee5dcddbb0b2880d457372b867e852f8473f. 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/USUG11800435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b7ee2695394320924da79b9dec9799fb1ad9c47f9c26dd88e94ffdfe5d0d71. 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/USUG11700892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd250d51349cd0a2af04130b6987488bc7823882f84f094360f8587d32c0d392d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S1923521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51900dd1f9e2233f41f6c7314e610bf079a18fc2704fbe6dedb6536d0c1bab9. 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/QM24S1923522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945bd65a76d527598c637c1237932ce00ddd04fc018706af8102e45e27fa7cb0. 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/QM24S1923523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28681b14242c7adb3303043547325e16c2ca485c171702b5056cbbff8fe64a00. 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/QM24S1923524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298726ad2db6970c70d40654a2c74158202d70061401c0e125e4ae5e1ad71095. 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/QM24S1923526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84ec07085fe2a7883f055739f22a353cd6b3b871bd4c5153005b1224298075f. 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/QM24S1923528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450c2110d843f27c128d79c71168ef4392cfa053e0c55be26e039d738a63d715. 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/QM24S1923530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5187ae73d27a99c80ad3d5160c6fec529b2a2df44731f0a5da726febeda74119. 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/TCACO1667440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba27213d25a0eb584d4c4b1bf6e3a3ab9fef582f54c9944407a02777979ae3a. 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/QZ85M2069230.