Sean Archibald (born 1988), also known as Sevish, is a British electronic music composer from London. Described by Aaron Krister Johnson as "a well-known creative force in the world of online microton
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 0x79370f2551de2ab25f2fe6b973412fb963c7bc40fa90ab0b1e2e5b489531adb6. 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/d9d304f9-a6c9-437f-96ca-ab0d44b2c48a.json and https://artists.proofprofile.net/proofs/artist/d9d304f9-a6c9-437f-96ca-ab0d44b2c48a.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 0xebb52cd870a352df521793a4da0a0fc92c3dcff1b422a911ecbf8a720a5e2c5a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USCGH1754590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd14d7d8b54dd876bf2e86ae5265c2d6b0cb81fa24dc75c6569627829ecbf7e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USCGH1754592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f79d17847e9d70ba2b0442afcc32b9332d72855bd2a696761fa69a128f1423. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USHM21704626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102945a52103279d34358e60a83aac6a33f111857bb3b34903af2a3d0364de25. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USHM21704627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dc2e705012b6c60a867ea82242d160f670af15a435f9ddcdeb0658e4820e0d. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USHM21704628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9ff4f0ee48fa02b5022f73a77306a189dd9e3ce1a7df1126a9eb3011b3b8e2. 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/USHM21704630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb062bce06810de0748b4cb2e2649b56b4368a7607a36c7c4fd6c2a7a1b88826c. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USHM21704632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fd0c3eff2662eed3a943d29c82e1cb412ce49f58486d1c90148916b39f214e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USHM21704633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dd866cbd3f676359ffba8e361df426c48ef3ad0bb24f3be71c2f8737621496. 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/USHM21704634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87544cd56b6f164cce5f1351d524926e0af99072e576ec726b08b110cbb0375d. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:33:04Z), 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/USHM81904869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2ae67f450a129ddce1d7d386e3913e987c3649c1b5d7a488b2f70a9511462c. 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/USX9P2000195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1724e465645857e83b2b3634b5785d99db9386fd13204c92505fc71d8e11e543. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USX9P2000197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb34ae5130384c5fa10478c099ae5e429e31115760e6da092a42f8287cbf19d1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGO2208294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55a33f1bd2333f0399663871bff5beb54b742521148b8b1ada1467b7296bfe2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAGU2373506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3e03e5c3d936a7e9d4c9e67914d9bc30758983c139b54de7c0cec38b814afa. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TCAJD2433725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8b5bdacf59def8dde6211c6929bcc18f71be9173f3c3f57a352eba5abaaeb9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJD2433768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeca3bdccacf58f1de455c839e72020eca29be492621e123641f477c92ed03b4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJD2433781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510f0363895d0441b1b650f2e44ae93a3f95681279ea90cb5d4e3e8bb19e11dc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJE2433789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2add3f14804c74eab36c48a1550849c3b3bc50a960e1ea5a6f4e8c065c442345. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJD2433808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a426f962102e20823b0e1dd118bee92f6253c548ca8e79140731c6eab99cc23. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:03:57Z), 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/TCAJD2433820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9ed60ca2b21474ed496d616c6b53cd085cc43cca464d2aefea4d1d2e4f75f4. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/TCAJD2433832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02eac14d052ff0f1a9d0191877dff588bb2de421b37507789754b7f977619ba. 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/TCAJD2433848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adc302c54201b30e124358b7babe5d73aaf5634ad5fefd36e78e7649829092a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJO2538158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a01e0d515d45a982f5ecf9f9fef3fc477adf8ecc9fe042c907666176b88c245. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCAJT2593351.