Koshi or Kōshi may refer to: Places Koshi River, a river in Nepal Koshi Province, a province in Nepal named after Koshi river. Koshi Rural Municipality, a rural municipality in Nepal. Koshi Province
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 0xb2768494588595e020d332aff1134bac261abe4677965b1e5bb7c091fe625048. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e5de394-2a82-4e91-8849-f422a592f1ab.json and https://artists.proofprofile.net/proofs/artist/8e5de394-2a82-4e91-8849-f422a592f1ab.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 0x20cd1e0e520c30d3bdfd96da8fb8646ed3ed3332ed98d837c63736b17ea9bdd2. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/CACWV2559892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07c5d63474d33649318361702d4a2d6192201cf6d3c100da7976d9c3db932dd. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/CACWV2580178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9c5c3ebb81f41590c8881a49c17de033908de695851c789a36b8ca323ec464. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CAENV2519300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64e4bb377f4482302a319b22e661a40c974f679b87defae0ce61188a2c4015e. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/CAENV2536487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28211c6115f56e41f00a83c2d32eee2a9213e7a2669fc0436d3a56b82ab6587. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/CAENV2538566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1f3aa52c2be1b4adddb998b52488b222de44eb8219c3970d9d519f9cdac0e9. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/CAENV2538787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8720e16a315354fce526551442453c9de815d26a8259697f4f474c5500a35a. 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/CAGOO2522551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c77bcd008afd12a369356c538ab34ea70b977b326bb74229c2be542d6cc4dd9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAGOO2543522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e4289416eac07abd30415014e37e6aeb46b895d9449f4ed82d77ee76d10e9a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CAGOO2572959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb806d2d6a02fca7d357b678d1952f2bd18ab5433bafa241f3bc6780ea7437e0a. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/CALVP2569361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1835d155a9021a5d576ed60f1fbac0aac72abc1bd896296ca7a8a2e89cb6269. 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/CALVP2571636.