Kosa may refer to: Places Kosa, Azerbaijan Kosa, Croatia, a village in Croatia Kōsa, Kumamoto, a town in Japan Kosa, Russia, several places with the name in Russia , a village in Bolhrad Raion,
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 0x14504d55491269f7ace1ad8bc18fd01ccbb60636a6afc7fc5f8e01867092bfa3. 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/edcb7d5a-f622-4501-9fbd-22e554150293.json and https://artists.proofprofile.net/proofs/artist/edcb7d5a-f622-4501-9fbd-22e554150293.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 0x704c3f0be1f9dc585982e9af0f86776786f060c286150cc6e0418e6e8382a364. 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/PL23B2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070ae027f060577ccca765570edffc28fcf7f3448128ea5ccc31e8d04678e990. 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/PL23B2020031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6565170a6680b40ce9017144ae957034760bd91f54f869c90823363339cd2847. 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/PL23B2020032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3d26d690c5b294cebf50636b3f5a3f70537a67c6e560380f07c7b6774e28f5. 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/PL23B2020033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48592520e660516adf21fe44cae73d0470ea05473efd9de88b253dbb8f3099c4. 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/PL23B2020034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c4f9080cdbd60c1a975e6ea59578d0bec3b933eb85dd014142a9fcd00ccc6d. 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/PL23B2020035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7021cce8fe6807c90bab6114d7ce4af72af93b18c19162a4f87292326ecebbf9. 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/PL23B2020036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d5d3fdf75a43f9e179d7801c41b9ea061eb9a51f7a301cc05e879e0635549a. 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/PL23B2020037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a25d26c25761d8b5c58cb59aad6f886a56ff08dc597964e41fe258b016c14d1. 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/PL23B2020038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96156d87c8a115f605dce25a7e7e4ed8386b27089838ea51cd5192a6bd3aeaeb. 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/PL23B2020039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2293c9f8c539a641a904da305b3037ba62c85fdc143f6f6a75b85fc66804a8d. 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/PL23B2020040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9372bd4a4fe9b3a4b240f55a6a2f95770a8cea84d1d42cc158a0c74e583f7cd. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/PL23B2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89781b2a531ef2cb55c9728d99e3a0207b028b1d8c3009fe8e547f4807eac80f. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/PL23B2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ac35868ea19e596fd4e5cc40c294fe417c4f85936bf2caf6bb816a433e893e. 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/PL23B2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa06746f4041d9017299021049ff21cd0f499facb1daa8c840ec67cde6319e2. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/PL23B2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3313efa405d61a77b2a0408e26a4d925fc5f4c0c618a48e5e6f4c178aab898. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/PL23B2000007.
Muzyka Śnieżnych Pól (Remix SoundDestructionUnit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482a135b4d9a99db8f3e3149f2c7a0c5a23e85c1e6dfc8f70b19bdaec4391bf7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PL23B2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236442203387cc5d7be5826e3b1b431ef4905d32cb16500f435055efc199762a. 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/PL23B2310005.