Coltemonikha (stylized as "COLTEMONIKHA" or "COLTEMÖNIKHA") was a Japanese electronica duo consisting of record producer Yasutaka Nakata and model and fashion designer Kate Sakai. The group formed as
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 0x7370aafa4662211679b828f2297967c066f91eee4ec23a23bac7e04d305c7102. 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/2438df70-8b2c-45e2-bcd2-9d861dff26c0.json and https://artists.proofprofile.net/proofs/artist/2438df70-8b2c-45e2-bcd2-9d861dff26c0.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 0x5a6557a637e1e14ffe1077d3ea8894d8625e7a74d4941e5c3e7bf57ee58ee189. 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/JPI801100241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6131c84262e1fed1ef90a13ddd8b0a254f4928d0d6966120f3e1c60d360618bf. 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/JPI800600085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e0531965d19398470a40a66f3dca671af01f03f5cad97c515a0d5df5f09f78. 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/JPI800600086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4318c562c6cbeba40a295d2bd1674f59e213d93d5d91c8f26c630c183849017. 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/JPI800600087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bdd67bf4c9c4cb190ad39834f91aa059849a2c8489b3d1473ef24d3877070d. 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/JPI800600088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45841faf4539e4622b614173547b9d05da1f825701b30f884ff4486eb9cb3302. 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/JPI800600089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a92d94b1e05f40608541c34c90fdbac44ee86f442416b6be2b338d15a42a263. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPI800600090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f128878627901d8fb75e2b4bb423e0f9576afa7aff999f2efa9726b9dcb359. 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/JPI800600091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3e9520031b7d1a14efd783addc81bac8716f64fba1a3c2b81105664ec0ea22. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPI800700043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51753f979d86d13180807b3ba1b902c1b556e466fc7ad0787f51d8d417df210c. 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/JPI800700044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865671c597db3da3de97b659edf084e2a712c1404e60623d4ec351d5034d7875. 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/JPI800700045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4105fa333e6da9175ea58bba888545d78d47f713c9f4a322059c1f3030c1ec. 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/JPI800700046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6458c2905ad1e3b2171c39d77d4e36918a5457f7b2356f2c90c6863f6f0a2dbb. 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/JPI800700047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662af52511fe2272477a0e467dfeae56f15a479bc7112df35510113a6205da8d. 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/JPI800700048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33da33f1597b54a0cd40f84b918a9c7889fb90dfb4c76ff94273761adf1ae85d. 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/JPI800700049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeffb0ab271ccafc1725915e77e016be078a17244bfea0daf566564f200c6842. 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/JPI801100242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3e9520031b7d1a14efd783addc81bac8716f64fba1a3c2b81105664ec0ea22. 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/JPI800700043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51753f979d86d13180807b3ba1b902c1b556e466fc7ad0787f51d8d417df210c. 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/JPI800700044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865671c597db3da3de97b659edf084e2a712c1404e60623d4ec351d5034d7875. 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/JPI800700045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4105fa333e6da9175ea58bba888545d78d47f713c9f4a322059c1f3030c1ec. 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/JPI800700046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6458c2905ad1e3b2171c39d77d4e36918a5457f7b2356f2c90c6863f6f0a2dbb. 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/JPI800700047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662af52511fe2272477a0e467dfeae56f15a479bc7112df35510113a6205da8d. 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/JPI800700048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33da33f1597b54a0cd40f84b918a9c7889fb90dfb4c76ff94273761adf1ae85d. 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/JPI800700049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9d456f1639bb59c6499f7eac71729c070d84b839c2c84f93a4985102d02f65. 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/JPI800700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6131c84262e1fed1ef90a13ddd8b0a254f4928d0d6966120f3e1c60d360618bf. 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/JPI800600085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e0531965d19398470a40a66f3dca671af01f03f5cad97c515a0d5df5f09f78. 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/JPI800600086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4318c562c6cbeba40a295d2bd1674f59e213d93d5d91c8f26c630c183849017. 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/JPI800600087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bdd67bf4c9c4cb190ad39834f91aa059849a2c8489b3d1473ef24d3877070d. 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/JPI800600088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45841faf4539e4622b614173547b9d05da1f825701b30f884ff4486eb9cb3302. 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/JPI800600089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a92d94b1e05f40608541c34c90fdbac44ee86f442416b6be2b338d15a42a263. 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/JPI800600090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f128878627901d8fb75e2b4bb423e0f9576afa7aff999f2efa9726b9dcb359. 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/JPI800600091.