James Leusink (born April 13, 1990), better known by his alias Ephixa (sometimes stylised as ephixa), is a Canadian electronic music producer who lives in Ontario, Canada. He is best known for his vir
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 0x00ae1d96605e4e2f77df29a5a5c71eb95cdb6f0c7c15f44ff313c7099f1e8fbb. 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/c786369b-5de6-4624-b9f2-1ed73a237396.json and https://artists.proofprofile.net/proofs/artist/c786369b-5de6-4624-b9f2-1ed73a237396.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 0xba74e4650650cbe00fd86dadd37ed23b9ce9476bafc0551ea60417487e80880e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHNC2436960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8e2d32a62d7c4715cdebdcaab18fcc793abc83a1b9d43b3df1847bd475286b. 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/QZHN62324989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f24665d1f0f77a0e4ee9c04c43c4265d1353cd83e803e7b92501b9cc6ba48e. 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/CA6D22000264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132662ae023bae83aa459feecc41f35321bae43d4f7db3f8a3eba62ae7903589. 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/CA6D21900221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5082736f48c086beefb9f581c6465c21ae2762eeb3cbd173f43d45db82e9dad3. 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/CA6D21800199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5923873169d516505f918fb9511a85587e6f9e3ea304d38db539339da29d67. 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/CA5KR1576516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff3ec700b58b055927a24d6a63dbe2cc2ee8439d52c776f295dd676d8376157. 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/CA5KR1569427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8041f7c5cf51ee3c53235679cdacf60481ece9675b940ee4e38d12e94745d702. 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/CA6D21700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc26c6109e82eac9b3c65f15817eacbc29265c04c61459e8880001cd8685482c. 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/CA6D21700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e417dcaff32a7f8b42126d2fea162a2b60cac643e3819aa4d02ca50f17678ad. 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/TCADJ1747376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb4acf5b1cc462f8bf3b5c471561846108de4a55f9e16b70b556f7113bf3773. 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/QZ4JJ1690873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0c3ff62677d1cdedb0459e940842daaf0ad0f49b5869cf9d5890fbcc8b27ee. 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/QZ4JJ1674923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8ab9211dd87e498a3b5b91b656cf6699d098081c95ce0c60e1be94809fc061. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZ4JJ1644591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7d5c0da299a9947318ed152b2127c873f4a11a3a6dc7a5ab7f6de0d83f8437. 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/CA6D21600315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93db88d86fb43047095bf4ea432eb331f688538a987cf666cb0f9c5596facaa. 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/CA6D21600316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17d35722b982c315a0c10ecb32bb7f97cd235b0b7de0c91f873ce6e61e65b9c. 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/CA6D21600317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641286315e1f61da99735dedcab77936d2492bbf77c89cbf805fd0929e5793b8. 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/CA6D21600318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac2abbd2614b953d70fe6e5082a98a3a7d575a1996f9498d3652514529c40d0. 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/CA6D21600319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfaaecf18d38e9d08cff628f79ed218316554616f7d3adf7049e162fe20484c. 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/CA6D21600321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568ae452e80747c8e0d0486d9cc4abb720b506b113c35ba01ab19b8c07a091ff. 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/GB2LD0902471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dfca46470683c004f2b2c2731ed6527bb165adeaf03caf0cfcbb21a477141e. 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/TCACQ1643507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b246944323308d721d4e88e01b434c2b759281ec9e7e70de7e9d3b12b01203. 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/TCABA1153993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b73f675fa0ae830619fca66bf61de74600e1d046dff829cae82f221453794c3. 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/CA6D21700148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e6368626d7eac28d9535fed240a8c2c74660c4a245c12c5d6e8da91ddeb58a. 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/TCABF1236843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132662ae023bae83aa459feecc41f35321bae43d4f7db3f8a3eba62ae7903589. 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/CA6D21900221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a91c51c37ec52bbca9b14a186ecf455e4edd662bd0aeedfd540ccc31246ab3a. 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/TCABE1206486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5082736f48c086beefb9f581c6465c21ae2762eeb3cbd173f43d45db82e9dad3. 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/CA6D21800199.