Coast Contra is an American hip hop group formed in 2015 by Mario Lozano Mosquera, Eric Jamal Morrison, and twin brothers Taj Austin and Ras Austin (twin sons of R&B singer Teedra Moses and West Coast
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 0xfa0e8d475ae82f1ed7f60892c1431adc917a6a7d8e24f9b6488b130c49b88945. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb423b0b-ba01-48be-8617-ab101e1619c6.json and https://artists.proofprofile.net/proofs/artist/fb423b0b-ba01-48be-8617-ab101e1619c6.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 0xc41d88d597ef3d1b73f6d31a1a812a7ac73a9a07be6c3896e167b3f41f1ecb71. 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/TCAGB2218111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5aa34863aa14a4366e6a649b05dcec1b165d7a9de870d2259fbce8a88c64245. 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/TCAGB2218146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f45f9268d1fb4eae6f9ea0ae5a6e6c54bd5676eb8b9f3089e0ab4f51e9724b. 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/QMEU32104044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebe29b34d4414db6bea42429af0c37bf00d9df0f686086e37c351d4865dc3e0. 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/TCAGB2218156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25b49469e18ca380ff6722e5af5b92a7521b40729e31d18f6bca01175568740. 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/TCAGC2204156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8fa2103399b2e39afc5b27cc1e0db0c1937842d37c566a39b75cd0112ee3da. 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/TCAGC2204205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ea6ab82d5e6d8142390b4b309d07512fdae20f145d11af25a7bf3c03b58d2a. 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/TCAGB2218167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429a9ec8bcecbf6edb15f66c548f799b5e527cb68702378bdb044a0abc25fd3a. 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/TCAGB2218173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a71b4f2836c184b53d6a5997240e1f0b2c274d130c5f4d56cab83331e6312a. 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/TCAEO1994495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd3547d0835dbc3a1ded7ef79a9f6d43fccd29aacbd5e449dcd403465e28c79. 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/TCAEL1933370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277c2bc6830a27f9c23c8403d88ed175123ee2b4e1997d4330cc1d537be5bd5a. 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/TCAGB2218236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf844c08b1509b83703fde15ea6090f4d551f0861f09d570ad1ad9fa72379883. 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/TCAGB2218240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20925dec112b21ff8369a55a932886a717449070aedeabc27dbcf2d4e0d1ec8c. 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/TCAFX2120669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbf50e5333a4508238218a11ed740939ddadbb2bd7d131a8be46abede3ee96a. 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/TCAFT2160081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f1f11671003c7df3d3e4f14e3f0e92ce428db2ba53dd8da2c23d9fd85b6de3. 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/TCAGB2218244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f4c6b8d3ea72956fd7e4b590a16cf62c9e439eae7ce4080baa2748eb849c88. 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/TCAGB2218258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7c76dd6707c7bea6d511b3cddfbe42999e53a77a2f165eb1b3113693dcd2ac. 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/TCAGB2218279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f58b6e98c8821030c806851a890e6d2c925d6e25f2d79d45d4cdee2ee729fc1. 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/QZK6M2413537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cad97b2debb1a5845c36a4f29e7ff89aab605f0bc101e0740a713a918c8978d. 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/US92U1908916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dd8a778186660dc872ed285b8204db25ad38bc12110a27b35af11e2c16771e. 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/TCAGG2242795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20925dec112b21ff8369a55a932886a717449070aedeabc27dbcf2d4e0d1ec8c. 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/TCAFX2120669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbf50e5333a4508238218a11ed740939ddadbb2bd7d131a8be46abede3ee96a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAFT2160081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951d1bd92dda32ee2d43665393b9a8a6a1f1b758657acac88c255f8b30bd4f2d. 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/TCAFO2120224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74400b53ff5f667fb31afd6ffe64a90c46d62b4c8874b55eb9fa4bc3487a2b01. 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/TCAFM2182786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f45f9268d1fb4eae6f9ea0ae5a6e6c54bd5676eb8b9f3089e0ab4f51e9724b. 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/QMEU32104044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d32a0a2103fd96f258d8866d6db0d6312c8919139b4194228c19dce7842962. 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/QMJE32400009.