Matthew Sims, commonly known by his stage name Mount Sims (or Mt. Sims), is a Berlin-based American DJ, performance artist, and producer. A native of Milwaukee, Wisconsin, Sims began his career in the
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 0xc39a1284852d3889eb235d67ce549569205146b474cb63b5bdd8f0741e27b466. 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/fa317313-90ee-4806-b7c7-53f39265c984.json and https://artists.proofprofile.net/proofs/artist/fa317313-90ee-4806-b7c7-53f39265c984.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 0xe5f37af4d7aee6b3f3e5fcbae855cf1c5ae901a0c3572e956a48cc9a72fb2872. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US25T9915128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f17646e28a0f001ee08e68f4637c9f6890883f2465c82f3a8c15ed64cb6785c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US25T9915130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3651b43ea80a6374b1b4094b84e0a6aea4943e47f64d92e89199ac957c319811. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/US25T9915135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9774687e5ab9cd858dcf9303a3b6f462f54020149e2f5af3d004b641ecbb9938. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/US25T9915136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb773548c7f20b1dfa5cdee6da8c43916654bc2b2518c2f989bee5c302a98e3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US25T9915585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf759b66484dcc99e810d4e7bbfd950f64d113ba9a7a94cd5e0f56f229015762a. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:55:19Z), 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/US25T9915587.