Kar or KAR may refer to: .kar, a file format for karaoke files Kar, Iran, in Kurdistan Province Kar (beetle), a genus of beetles Car (Greek myth) Kar (novel), 2002, by Orhan Pamuk Kar (politic
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 0x08928b1480e9b05b405d924c34732f90fd8ed4b53d62bd48ec31366dc7abbe32. 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/39159844-eafc-4d0f-9788-83814ad6f42d.json and https://artists.proofprofile.net/proofs/artist/39159844-eafc-4d0f-9788-83814ad6f42d.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 0x476d0300d4387291a2789bd920a745883c89569d7b7032a760f3b6c9a04fa4ba. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6Q1920398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a82190cdb2560f567c88b76a950d6d28929f5867517e4c6c088b0f84569f0e6. 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/QZFZ42008352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842920d1f5c176a759c411418c170f4b5fa1873264eb7e0a6c018110cef9e97a. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZNWV2016451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9833a7a110ab705f4f7f1f9daced0fe95be30735b6cc1e2f7aab0d3e82b3ca1. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHNC2176363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3357dc6c1229b620052eee9ee86251552d10c38ce7a1984ff4e99c76d9bcadec. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHNC2174998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed869c46e763c179e6866ea3bd05ca0119f2ce848046d807341770af7774123. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWS2179484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7751d24d087920874f716ed41ccd01160b2bea0555b522548b4ee09604848bf. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWS2180034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc9e90a1576db0c9d7c133d5481c8afcb5d2a3ec1995e1cda6dbddd0996e3bd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWS2180035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3d7b550b862eb4ef311f57682c54545b115d33583f2701270c6a2f5271be7c. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/QZDA42252596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a86437bed433758374f546a837c191e3c327258d75333a53f8034a3c2567f52. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZFZ72270839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4661f8b452a1affddbb9afce68263c3dc39a931aeddcea123d4e05ca21cc682. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZDA42208814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6380afed086190505c1537f5e415d95f36724473fe6e5ad2c77b4cbdfb68be. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZDA52226324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e92247e7a69aa6c76a6bb7fac2f8407228f9a44d9f51285d70a1fdbd1218f9a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZHN42242402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34a4d54a3e16cf0825ed249b13915ff94dfee8ffd0493e2315d9c663bfabd91. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNA2269026.
Maya Volya Maya Dolya (Maaaayaaaaa Vooooolyaaaa Maaaayaaa Dooolyaaa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1914b47d7c50f1ad1e246597b9e8b36322b8df240b7517734a5afcabb6f6ad12. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBA2223745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9915b77e5b041e8a9a67d65e5ef57a997d10ff2dfa67efbf802cd8e3bca3d5. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZES62467767.