Kojo or KOJO may refer to: Arts and entertainment King Kojo, a novel by Ruth Plumly Thompson Kōjō (Eng: The Factory), a 2013 novella by Japanese author Hiroko Oyamada Kojo (company), Australian en
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 0x21d4c8ee0cb4a77e692882290c83833f8344e721a699c8cb5e98fcac192bc889. 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/c4c99e6c-be7f-4889-b058-a39c0ebdfd4e.json and https://artists.proofprofile.net/proofs/artist/c4c99e6c-be7f-4889-b058-a39c0ebdfd4e.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 0x6fe62fe38b263fae99f08e60ec54f31b738fc9a194fb124d3e56bfc050ffb154. 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/QZNWR2348381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c8b6b293a372e0b441aafba1e8195533f17d51b90b5a146a06674fca3e1c5c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FRX452437265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287e9e20e0910783ad0471aa8ec94257ad27316ce8d362006027b309c0c81dce. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX452437266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0533208453b8a36f86b4544c1962c9d39d9a4e71e4b2aaecce37b7a33c3621. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZHN42454378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74e9ae3ff800627e369cbcf450546e94b77706eafea88de42d6539edf859af1. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZES82484108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39502e0ec0b4332cb1b637d5af2331e0558cae33cdf45ef9030c142a91cffd5d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ42460752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1713c4e918246d71aa7f61404917e46d91f1bafbff057492da2e6a75d289f6. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZFZ42460753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f2a26c3687374a450f04ad8e3d55d1368d3597e6d6b269586b6f51ad65bc88. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWFH2364157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17093b8e498976df382bd7c922bbb3f2ffff851b1cf5c177cdcd49202f2675a. 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/QZK6L2334925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475794d9e7e5ff349149517acec34291391b739690b36d2fc84564493a2e6563. 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/QZK6L2332398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52f16bc17199410f5918e2af3789547040ce4ea3ec42717a749e690690889a2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNC2394509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4b3308abada6a63b11c38ae102baca455aea6affcecb4e5e7ed24aeec445d6. 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/PL2DY2302191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dc2a28b84cb34c612d6563c7cb77e5cd6aba358590df7861999eb868afeb22. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZDA82397165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1045990f06c72f15dba2986a5089d213cb3171c1252a27ce3fbc45f0b58b06b0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA82397166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6ec7683de86daabbd7e8bab6192b67460b3c9da9f403ee3fb665dfd9fd6bbc. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZFZ32301635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a0cc62ae3638ce4c71e31e8cf28cea317ecc1c2c89fa1d649b79052605aaeb. 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/QZTB22201813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeacaeccd1e4a991a993bc0515a7c641a02dba2c35cad64d0977dd7cefd09ee2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZTAS2283268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc334e698f29c470faf48ca2f9f8bb48b0c02a299fadc450f52fb6f21dfecd72d. 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/QZK6K2456771.