XINU Is Not Unix (XINU, a recursive acronym), is an operating system for embedded systems, originally developed by Douglas Comer for educational use at Purdue University in the 1980s. The name is both
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 0xfbe46ddf6c9c3f831df2ad185c75a9aa661bd691ed8b8d922f102b3348161f5e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/990b20b5-3926-4be3-9015-d8f4b03156b1.json and https://artists.proofprofile.net/proofs/artist/990b20b5-3926-4be3-9015-d8f4b03156b1.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 0x470d251473734b6a1873f99768e2b5e546da76a54b9d620eb9c81bf83e3ade96. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/JPPO02200398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642c2b2f1a1ce47221827410aea105edc413fc0017b455dbd843c52cbe5034dc. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:05:51Z), 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/JPPO02200947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367536c07ca4d2744d0fd01b27ed48a06e3a04030d54f3f9b9d82c5b9289d3d6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/JPPO02202736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fa9e99b1395b378d62bcd7004f3c37b07c4d1d86163546f2298af1cdb4c5b1. 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/JPPO02301103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b819db23583e204bb788fbed09d05671d5c2fcc100a00009c69dadac62f23d. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/JPPO02301241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30424f20dadac592863e4152b04c7d0b0cddc556a4540c743dc9a675892c762. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/JPPO02300837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a5f124c196efbe9ad9b876a2daf5ff575e0845892fb2c216ba379a867e9f18. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:51:13Z), 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/JPPO02203630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a18d75adb88b7177b621d616204e42b61151f6b93f8a9f274a71249ba385a7. 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/JPPO02301240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4137daf6a6665a783fa41cb7394ef58c27f3fa6baa347345cc3b4aa68b3fe834. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/JPPO02204221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367536c07ca4d2744d0fd01b27ed48a06e3a04030d54f3f9b9d82c5b9289d3d6. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/JPPO02202736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5711629e961ed9a84037bda56624e22b5ae0c4d6e0a6f7de9d2e68d90411c770. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPPO02301242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c933fca2d71c5542d5da2a0c1e9b57e9d2f8a1e13fbd5ba385cc00151edb344. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCJPW2338674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16698ebc88ce0a9cc3157d2bc43ba94ead757b8419f2fbc3724b056648d9571c. 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/JPPO02400582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4d3071b322f37690e2c5a854130eb80dadcb9be37af48960cbbc84b49c7f89. 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/JPPO02402368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2387bea9eca6c4257f592c444e49c1df617442aaac9eae3ceae645f951d7885b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/JPPO02404319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3570b2d772ea6bc6c42aa350285998f8ee9e796fc79329250d5e1ba7485aad. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/JPPO02402957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bc481379168430841ec450e865368f12839f708e5b41b613977db4aadfc3df. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:44Z), 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/JPPO02402959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4d3071b322f37690e2c5a854130eb80dadcb9be37af48960cbbc84b49c7f89. 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/JPPO02402368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5151ba826a690835e11cb9245c1cb0e16272d7632edacf9af2ef8d6240432d. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/JPPO02405497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16698ebc88ce0a9cc3157d2bc43ba94ead757b8419f2fbc3724b056648d9571c. 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/JPPO02400582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae490495b988fc369b8bdfd75a0af26c3a83fd449aadfa6e22f1761d1aa49c5b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPPO02402960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa9cd42f533872fcb4ff807e92490e26be3af31d97ca16c25876c5a7c0e0467. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:19:49Z), 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/JPPO02405499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9e3ebdcc014b3bcd0ba773c46a9f7d3d615c3ea6fb3616dce94c5806815d9d. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/JPPO02405501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356a5a79e485648a0e54d18106ecd706d5e82a3f9898362c2e06ec9bfa03ffc0. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/JPKI02517350.