Kat or KAT may refer to: People Karl-Anthony Towns (born 1995), American basketball player Kat Abughazaleh (born 1999), journalist, social media influencer, candidate for Illinois's 9th congressio
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 0x381f360bcd0d0a6e03317385189289abdb6f4282ab792294f0de6bbf2c0e975f. 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/c92f5675-5199-4f01-aa68-46949b0747c3.json and https://artists.proofprofile.net/proofs/artist/c92f5675-5199-4f01-aa68-46949b0747c3.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 0x63fd77879ef04f2e524b84499f564958f5f43e033621e01bfe57121d61f75778. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/PLA641609978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7b1bdeccc3da2e1b98442aabba02c95517482ec480351718c94a368ecc55c3. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/PLA641609979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3f3045c0a8d171464b8b0e32d79165fc8cf537a56fb5971934f7b3f16f3ce5. 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/PLA641609980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed56bea422fbeb3c355f3d43c163e86041efe0805a43c3dce17f09b073c2cfe8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PLA641609981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255671d8c11d1f8c62b34bad81d80f7ba0dde402ffd5c5ce4bd33a037d0aee9a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PLA641609982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52bebd320910b9f4045863085831c8a4d047f61c65fc79a0627230e453c993d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLA641609983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2477d60967b8feace40cfb12fa9a1fa934df2cb463b172dafcf163f88dabb32d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/PLA641609984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e666a00e87b2994f753fb6db89ea168ea59f3162d09fbbf3a60b94de249dcda. 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/PLA641609985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0d73bd27d918fc2abe50565ccc33ea75083338f32f1307f5ba5a082c0472c1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLA641609986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8e0d117fab52d4518f3595576e02e475085783b12e10394fcb9957cc4a8ead. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/PLA641609987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb068dfa3efc26552a675433e649b8cc185b4e347b5d76bb0662ef21ec04c380c. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/PLA641609968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913fdb6078e5c3cb89c418dff37a33d4955f44bbb046393d6380390a15d7a400. 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/PLA641609969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd0b7326c541d91d4d01eb970fd3f52cf281dd9b12b6792e9ebd0041860e705. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/PLA641609970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fff213770c1012f882f3e6fff16345e6928a69c9cb665597c0790fd4b3bcc2c. 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/PLA641609971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bb68669caebe052d2f61835d0d4f7609230b5ead67292ad89768f023738831. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLA641609973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce93ee30bfe13ba96e80d5d734193a71ae96b8e954ef21883bbe3715097f2454. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PLA641609974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093e416a5f48687ebe87fe5b0849eee9a128e65d7a7f93dc552af1f0a7b9076f. 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/PLA641609975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a96affd3934eb5bf22b0e0c30bcfbbd693cf9273676643fdbe1c5666b0512c. 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/PLA641609977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb3ddcc7c41b1e15e44bd24e8ffbd0c3cc7a13ae81fd0b1f3ff21e142a13a43. 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/PLA641610016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84be4eac4f549131dccc585f29a6527510ad99fd918fda5df53fe156d0afdd8. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/PLA641610017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270b55725b4e66f44c5b7f1afadf1599483d1877344a76c3f0b34a1c51c5d76e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PLA641610019.
Róże miłości najchetniej przyjmują się na grobach
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10d96362e5fe0466b32df15dfd7bb6d4ac1ee4710f925ebb72d9732bed15a38. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/PLA641610026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa381cfcf28e82fd1f4f5f0f014fb3db242d6f5b81f65125dbcf249ac0a5732b. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/PLA641610028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd9271313c74efadd81ba455c5bfae05d3576cc7829bbd414f21742a3373936. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLA641609995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfd1be6916beba55c452f018b868161c1a3feb1aa076aedfc68f015325e3d63. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/PLA641609996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e22f9b56e3c4e4c3f1d8979687e4f2aef5ba8f9b2f9495eff9595a9c969bbb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/PLA641609997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ceba26aeea172f3e6094bf287379da094d02be784f20bbeb8e68c91301db83. 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/PLA641609998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c21d69428196aafa50302c12fce7f449fdcecaa8927fec972a63036ac3e49e1. 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/PLA641609999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5089545566c75b05a04622944b3141205dde83478885ec261f7a1e6c6aeec19a. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/PLA641610000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf570ac70fa3fe74b875ce4900641991972d67081e46e0790481d2e8b7fa09ad. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/PLA641610001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb5e7db15a55cabe97770d5a5dce4b9c7610e1c93c21cc8d507a09b43c8237d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLA641610002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea90c4dfe4c31e626c1ba18444f485f0eabd3bf0709624582c5e7018be383d6. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/PLA641308626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fe9bb3d3327881fc8f4c858c38296f5141eb7c44e8272dca361edcbf8788e1. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/PLA641308630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef35e1d8be7c90ef83deec97f20cf45814a4f3bbb361be238790af5f46f6f8d. 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/PLA641308632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a0001ec872c5b77a1729519038bc223a5e98510b2fd63355c35051d0ea1a69. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/PLA641408820.