Zachary Chapman (born December 17, 1990), known professionally as Blacc Zacc, is an American rapper from Columbia, South Carolina. He rose to prominence with his single "Make a Sale" (featuring Moneyb
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 0x854f5ea883bdf1a1be8051e19ab3b2c1fb76fcf8a8760c3e17a3f5be5cef1236. 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/763baf5e-da08-4ec2-8214-c3b7b7ec784b.json and https://artists.proofprofile.net/proofs/artist/763baf5e-da08-4ec2-8214-c3b7b7ec784b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Talk to Me (feat. DaBaby, Blacc Zacc & Dayytona Fox)
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 0xabc04a3fdb739c92e59d86aa0df053eb6c03f029b56fcdaa7686c2c15ce1d754. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12217274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e13f815b0f3fd44625564426ba2876f2ea59779ecb462e30d2fe47a3aec1ab. 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/USLD91738826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913a747c61405b6a31cfe867abde2d5be2f3b73a13642b25e4ebd1e07d21516b. 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/USUM72018915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2765419c03659ea6718d58fdb6ba3b65b4368eb50d368581da8ad8a131f02fa1. 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/USUM72001883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3c4a1980f233c8b1562e79ea17a096339315db060ff085575ffc1094fd7e2d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM72003855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902fb18914dcf747e0e1ca725b6e30b803a2975fef1aefa4cde2b46b24923a66. 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/USUM72002157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cf0e0885249c5ffdbcca622507ca25843f6965a6b7d3f84973837063622ab1. 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/USUYG1262668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f6144ec97cd38d30d4a60826ea97b60e194ea762525fe6528302f6cd3c8827. 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/USUYG1263275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695a36a47d2a8ebd753657574135f4df46893f95976f9b74303951c89516ef88. 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/USUYG1262677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0324a89c8ab8c93289b034a26f2ab16e8fe2221250412356c308aa1dac63298. 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/USUYG1262674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce8cad993254d26f3ac1180ee4c4ce3a0ca1b0a94026af656b510079fd0630f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USUYG1263278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788bd595a489acf3dc0ba5e289976e0f600614bbab1e48b3cf3d75477f190b07. 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/TCADW1856969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef836ffabd3292135198f863347bd9910c4084be86c6b4faeab97b020b6a48d. 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/TCADW1856971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08c53ac2b163ff8feedc2994115186bd177d6a1d76b20c94817028d54cbebf2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USUYG1166863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb673d4738e7ce8f0b13bb1a3d4325b1dadba9c85621cb4f237a3c7dcd98cb2ec. 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/TCACQ1687772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137fa77ba58034844baa347f1047173e50077b102c50abbe1a541f09f8666506. 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/USUM72015436.