Da Lench Mob was an American hip-hop group from Los Angeles, California, active from 1990 to 1995. The group originally consisted of numerous individuals associated with rapper Ice Cube, but the initi
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 0x2156e15309dc9adf7404fa68a9b7dbe654809e12f91c5e0ae33dbc8bd301b46d. 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/1acdd470-cff3-4152-b5e0-b22775e01358.json and https://artists.proofprofile.net/proofs/artist/1acdd470-cff3-4152-b5e0-b22775e01358.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 0x27cf515a092fcdc6e587c6cfc9b383a787f7b81f748dfa7ca9f21594aad6e2fe. 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/CA5KR2202328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b458f60eaf86ffb0f0606476b9dd5fc287730502d22455b3aee80af109c9036. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CA5KR2202334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d393fc8a98487ee17153f69c40f90c72e7d6e9916364e1ac786b417b660820. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/CA5KR2202340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366c48b442f0d999ecc422b4bc116728212f1043a986de4ebe45cdff503a5938. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USPO19450043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb73d6b8f0c76f2bed189b9079eccb31a337778f9da06d79ba3c2c26264f260b. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USPO19450045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d0864bc4dcd6944ee0020d76eb76e5bd082b1781548f9286424b08b198297e. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USPO19450047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975ce7affacd4b0ab43dc6bef69b65edec3c5c420060f37c434d531e7c8f438e. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USPO19450049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c26e56f5c8937e79cdd970befd246ca108ce27403cfaa0f78a5424071d3e0b3. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/USPO19450050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617ef94e2e7072876e6f47c69c94c4175dbc53f9ce773727803b8c8980f680d7. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/USPO19450051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ebb5a0f9c390566d1ba3863d40b63cfa36090b433a8888fb513b423997da90. 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/USEE10183406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba74e8b22af22b16bf59408d7ef420e3b9a21643201e8537244ad5fe5300dd8b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USEE10183403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd295310344f29c7ec2761de4c2bd9bc640a27ea0fd20c42451f3b13b8fe8858. 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/USEE10183409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba74e8b22af22b16bf59408d7ef420e3b9a21643201e8537244ad5fe5300dd8b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USEE10183403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba74e8b22af22b16bf59408d7ef420e3b9a21643201e8537244ad5fe5300dd8b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USEE10183403.