William Joseph Crawford (born January 28, 1984), known by his stage name Ya Boy (also known as Rich Rocka), is an American rapper from Fillmore District, California. He is best known for his 2011 sing
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 0x742fb1575ed006ba7baea50b49f2098591035d86fa7aad1e9d6922a68a5f1ebb. 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/985c3d75-739f-42cf-9c23-95af28371d32.json and https://artists.proofprofile.net/proofs/artist/985c3d75-739f-42cf-9c23-95af28371d32.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rookie Of The Year (Collector's Edition)
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 0x0023b047d884d445957a692cc2910a560f63d755abfd0228258bdd11dd678c17. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/US25T0912354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66f8bf8e91673f3d1098d88416680daa5890e344494add34a1fdc7fd105a760. 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/USQY50945872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8160289df8cfa0f55c42146eb944e8939a33e1d3f4eae738fa1a67e621d9d1f2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6G2526980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb23e20d86a4cc63f2a819e6ae40cd3b566e2de46ac962566f22c5f4e6689c00. 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/QZK6G2526983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ca1d05862227261e4a2ab8eec30f8932a365d4dd64e58cff7a4cca10c79a62. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:33:36Z), 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/QZK6G2526984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84a352b43e83ba2cab15bfebe925df542d9657ae9838e23ca57eabf7de1b50f. 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/USLD91715964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aceec9aeeb25cff6789b95d0abbb1d6c79862afe4239ee7910942a22b5f256d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USKO11101075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5eeb262272de0173e6b9b94fd09b740258a061c7cf2485cedc3d34493cf9d81. 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/BRUM71002319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd64a245a254b74e40d55109d1712b0aca16affaab3f907e1ea378c1973d94dc. 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/US8AQ1010185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc985215d2be441ab7ccaeaf2b170c6697b2f8282d108875d72d6dbd1b15289e2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US8AQ1010195.
Meet the Dealers (feat. Big Rich & Ya Boy)
E-40 Presents: The Bay Bridges Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429c02741fa9bc3a4f603028bbd4cdd042ea9903e5c59ac146d86dc43a910176. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USQY51351890.
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 0xa2a6305422fab79c85b57802f1e1b1967210bb4b49979df8f080088b58a43b73. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USUYG1045336.