Matthew Embree is an American singer and guitarist best known as the frontman of Rx Bandits. He also plays guitar and provides occasional vocals for The Sound of Animals Fighting, in which he is known
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 0x6cda241bc29e3e017669ad71dc4223fce059d7c520f65b88d459d7a051f624ef. 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/c1b8a631-08bc-48c4-a1fb-ee2e02269669.json and https://artists.proofprofile.net/proofs/artist/c1b8a631-08bc-48c4-a1fb-ee2e02269669.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 0x48c01ed8ab94d7712a7d0ff82b6bca8576f52da920ad0a4ac81ef8b56dfaecb0. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCAEM1917069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f969bbed20df0c3b5e71be0795cfa2015472018a425bfde4f230f469bdb9a8b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QMFME2440555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e50e500306635a8a4fb16c71dc7c8947b0851757be2080bda4948c7a87fc46. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QMBZ92444727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b0a3555b462e60bf2c9da96ebfd3b72f526ec4b51aa12c143901d0dec79aa5. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QMBZ92444723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0112492a161364f181e5b72711191cbfe889e64a2f5274ea3f6fc524c113261. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QMBZ92444724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ddf67b6a5c959997782eca503b633060e6972b33141b2ff5c2f990c44ab959. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QMFME2440552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972102729d5d8e4a9d791c3d96a089de367c04a8864637e4986eee7693c2f5f6. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QMBZ92444725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f969bbed20df0c3b5e71be0795cfa2015472018a425bfde4f230f469bdb9a8b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMFME2440555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f34f54fbc137ac0049c29b371953bf39be84befb0dc88ef63363e1b907f8d12. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:06:56Z), 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/QMBZ92444726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e50e500306635a8a4fb16c71dc7c8947b0851757be2080bda4948c7a87fc46. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QMBZ92444727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde99aff339f8c2b8b2ce689cc40231ef1132b54279d456023189c4abc41bdbda. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:06:23Z), 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/QMFME2440557.