John Reuben (born John Reuben Zappin; January 14, 1979) is an American Christian hip hop artist signed to Gotee Records until late 2010. Reuben has sold over 200,000 copies of his first four albums.Br
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 0xdd00df0a2a33deb4808911e15353a3e30fe99e3cab136b1952292b0bbcd92e51. 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/bc828968-6164-4859-b130-2b040d6c03a4.json and https://artists.proofprofile.net/proofs/artist/bc828968-6164-4859-b130-2b040d6c03a4.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 0x6b80484fa9d9f071d41c076737c4ecc7021d2025b31a3e4b8160378806265631. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USGOT0402027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb7dbf0f25bdf2ac270da0eac8ec9cf9bc2061c9784adba0c378a1d922eb764. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USGOT0402039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85e4c0699ffe9578e37f20076679b8b9be9b1369219cd59296e54e8b7b3c461. 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/USGOT0202007.
So in Hindsight the Professional Rapper Isn't There Yet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bf8b908fd4fbcb28112f33633e9444f6c976b67c316bacec46c808aba0cb16. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USGOT0502063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ba1e06aa511cda45ee73a8d3862363beaa6f4ca7da11939b1583888f94b935. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USGOT0502069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c3756a09133d5f774a4c41816b7d5dae829462540006eea86fced54233eab9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USGOT0646094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a3bbd2dd71b81032b42a46f52c9086be62a491e958812f6c3c0c055b8769e2. 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/USGOT0646095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46399ee403a702947747fe59c9d3580838e1abc0a1dbf0b65a6c13d333c85a5d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USGOT0646096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1594e58e96dad4e4941059e57122d8e71b255dbb2682f588748bc1688a076e71. 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/USGOT0646101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28a2a5e3c3c6c1b75bc77b14d5702e72b40ad7321b6ee702f390add5ab171e2. 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/USGOT0502062.