Gary Eldridge Grice (born August 22, 1966), better known by his stage names GZA ( ) and the Genius, is an American rapper. A founding member of the hip-hop group Wu-Tang Clan, GZA is the group's "spir
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 0xd1c3ccfb471de9a1898b37e71f876d5ef838f429bb728d6ece9c95a2ce58c2cb. 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/cd0b3341-f128-4787-a8ed-270cfd606403.json and https://artists.proofprofile.net/proofs/artist/cd0b3341-f128-4787-a8ed-270cfd606403.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64a67039eefacb3b991e5c1f890254b2749b7f43d1752e6fb879e05c7ad1d44. 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/USGF19581306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10c75bdaab387232b97f0c1a02b08f90244abc09cfe5d660cf56d5128833018. 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/USGF19581305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab2c803c1feb14d6508fc52deb94a5b8e522a0294de4ef7bdc7284841bc6cf7. 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/USGF19581314.
Wu Tang Forever (ft. Ghostface Killah, Raekwon, RZA, Method Man, Inspectah Deck, Cappadonna, Jackpot Scotty Wotty, U-God, Masta Killa, GZA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542aae27d0fcc31bf3933dd556fbd9ce2f4b6f0eda707917c97b44a4505d9866. 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/USUM71815323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cb172bf129d6f9f9155c34b00c0876bd8cfd200c43da05df96dd801d6f10c6. 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/DEG930820121.
On the Eve of War (Julio César Chávez Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea884df111a27336e9792e2f45e7b959c476117431c736769b5813e98e5cec7. 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/QM7281674154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab2c803c1feb14d6508fc52deb94a5b8e522a0294de4ef7bdc7284841bc6cf7. 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/USGF19581314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb115d0fcd5eed4c0f65552dc9e0dea5cb8cbfe8b19759cf17e4e5a7182844ea. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USMC19959192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab2c803c1feb14d6508fc52deb94a5b8e522a0294de4ef7bdc7284841bc6cf7. 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/USGF19581314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce1c13ce69223e01abcdf33d1578a48a72e64e45e2a6e44963cc89547300a4d. 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/US36T0521202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bf3efd9176174618ce17904d05eb465d1c6c236d306a2f870f3e9540d513d3. 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/US36T0521215.
Lyrical Swords (feat. GZA & Ras Kass) [12"]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff53eafb426b4ad45bd37d0043abd30c1cec5285a6719ed6e75536a802f2558e. 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/USA371140537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd91a2528c9f2de0436eac78d86d1c6bb5fbce991547eac1010319b6752e9240. 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/QM6N21914651.
On the Eve of War (Julio Caesar Chavez Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b59137a6153045b5f8e6aed07258a64c702ea739b6d373de843ae02af6c9d4. 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/QM6N21914653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab5b93421109fbc12fa07f8032d4c7f1da5893f2e58734e2948e66f2b0a25bb. 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/QM6N21914657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160ab8f3ae31d532f45d31edcb52796d96dbb3a2f69d184ff13eab321be4705f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:02:00Z), 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/USA371140536.
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 0xe399d0c8302ff3e983e49f3edd33688bc016a924ea5432fcd9ac25d7e9369754. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMDA61850923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a774cc84ad3dfba547ed5abff895778725f13f878ebfb8cac2824bc7191de8. 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/USA371140538.