Das EFX is an American hip hop duo. It consists of emcees Dray (also known as Krazy Drayz, born Andre Weston, September 9, 1970) and Skoob (also known as Books and Boogie Bang, born William "Willie
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 0x664c0863f6ef1beb9c6a2245c2be534f8fcc99ddd45c82a69a5a7a624d453156. 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/68ccb1a0-5abe-42c2-b2e7-853e8b337768.json and https://artists.proofprofile.net/proofs/artist/68ccb1a0-5abe-42c2-b2e7-853e8b337768.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 0x92f3d8d03bc2cf2bfa84dc769df55a067b14e192a5a9d536a176d82d85634e42. 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/USEW19200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76ea4d6f925c56af120a6ba68b875f277cadef96ea4c695f044329fac52e9cf. 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/USEW19794615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e68632f2dff57aac65fd6dfc5a026ff2a644300de9df178797704a4e891736b. 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/CA5KR1924590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76ea4d6f925c56af120a6ba68b875f277cadef96ea4c695f044329fac52e9cf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USEW19794615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8100a90809b723c71ef7a82569bbc62d73f42083e2aae3a263b7e289adbde058. 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/USEW19794619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4004d9209a4f84b71d0c1d1d8b59f00351f785f5a2341992740f6352c815dba7. 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/USEW19794623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf572359662b413ea311e76f6ab52804cce2a95798da22dfb62dce1b382160b. 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/USEW19794626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0bf93361842af132085e1ce7a190d365ee197c006bb412894f806c98ff62b9. 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/USEW19794630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba455567d95a694d32f63407b4ff454509ead7249014afa1bd34ace0bfc2846e. 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/USEE10181410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20709c6fbffeebf6c8eed520ec63ad6de55cddcb952d8bdffd987f595b3ae00b. 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/USEE10181412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2aee0dd55a3dcd30b9bf8d3f13b8983ae35aeb979eabd0d387020a71faccca. 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/USEE10181417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22640bb9b60dae2886d5b5fba5d5db00f7509dccdec97fbd361505b61ea4688. 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/USEE10181421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08137575aa2b6f93a4dff8d2c2a2065df05590bfb15d499871118d6e0661ff46. 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/USEE10181443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9887b93f9d0df9a181ff7d620125cd3ebce319e2507173863dfe2d973e7b8f. 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/USEE10181444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb8c22c16548964533037c3accba9964448617a6c88f627b2c96b33712a77c8. 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/USEE10181462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c952b44b4e2d860edf91e70da8c6479e8aaacab18c1cccc0f2adc0a76cba3f9. 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/USEW29300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ebb1c59880e3eb538c06bd0b63ea3bcfea10dfe23a1d813f894876956619da. 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/USEW29300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf35776bd8c99510435e12487e5e86e6050581043cbfd389c6b0a1814063926d. 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/USEW29300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f3d8d03bc2cf2bfa84dc769df55a067b14e192a5a9d536a176d82d85634e42. 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/USEW19200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010905a77a06d4d8623434d56d095d9ac14e427ab8be39f9a8dda728aa1453d4. 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/USEE10181363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e1a73a9002b2ada3f71f9335cbcf27cfe4b488a0687f86df17c2b17f18b136. 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/USEE10181357.
Real Hip-Hop - Pete Rock Remix Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f56bde37ae63717ba86f191672145e2753d88cba073f82261664013926ec6d. 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/USEE10609970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157176bef93e45a78c929584d904d04281ce053f6fb3c607f491415e8d855c55. 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/USNRS0420642.