KOF or Kof may refer to: Kaph, letter of the Hebrew alphabet The King of Fighters, a series of video games The economic research institute Konjunkturforschungsstelle at ETH Zurich Köf (disambiguatio
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 0x0014c82f538e3e0cc24df011a89143a18aa11da4c46b99a7ab286d63c9b089c2. 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/cadb7ea1-f347-4815-ac67-772c12794f0e.json and https://artists.proofprofile.net/proofs/artist/cadb7ea1-f347-4815-ac67-772c12794f0e.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 0xaac2ff292fc6893109644959a6563b552ba7e504e3eb75c4153b7bbff7ce02e5. 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/AUMEV2363367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e8f78e27c77b2cc7b262709cc6805497e51fc47da2158f85abc0a33a745e4f. 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/BKAVO2200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de7564191fc6f50e8da303b33c89e8ed7b5af563bed4bbdac50cc6f35e421b6. 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/QZNJV2478363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcebb3d11273b1d65b9e1a4750d37178025660f40c671d81a0c4775f9486b31. 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/QM3DF2219367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cc9af8f15b07038a63dbd660870ec4df3fd218ba696b234977cd58cfc77292. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/GB7GV1213006.
SEM ALI4NÇA NO DED0 (T4TUAGEM DA AR4NHA RMX)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db87d5cbf2f02bb9c4179bd31efa5633119587b25d132cabe226a562d51cfc2. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USANG2285024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83382c84385adf3c6caed51e50d43cc16631206d978eb3a2b55679f0fcfd414. 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/QZHZ52130593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f40d5c8a069693ba51800c863aa31e8ffcae577dfa089b5f69f12d1860e863. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/BR1H62200211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c6140ef731a965bf63ff065d61199477cbabfc85d0baf42fbea00c5180c6db. 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/BRUM72200334.
Black Lança (Catucando Gostosinho) - Kof Remix Oficial
Black Lança (Catucando Gostosinho) [Kof Remix Oficial]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df135e5896c3acf3f136b54eb15b964793a4e32da51e0341685e05462279237. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/BKAVO2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cf27ddc29769a0acfb97166e99b07074a384fb1d6e8e99d03784f5aaf561c3. 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/BKAVO2200628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0b5cef39541a7ce993d900aeffdb42ef105980f8e4a8c1c8fb93441c6ce722. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BKAVO2200315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c633429c67ef8ef4e6cf9633f976c42a068fa9268ffdc8d440a3bbd1fe5a54c. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/BKAVO2200313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2857d22dce2ff6c2d44667ecf5c942bde2054dec0528509c1ac8de5da3d29a5c. 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/BKAVO2200035.