KAF, Kaf or Kafs may refer to: Places Mount Qaf or Kaf, a mythical place in medieval Islamic cosmology Kaf, a city in Al Jawf Province, Saudi Arabia Kandahar International Airport or Kandahar Air
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 0xd87ad6efbca02a2cfa696ba9fe26e86f0651983200c0aa7169aa1e6556ef2f2c. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28b16334-8370-421c-afef-075faf184bab.json and https://artists.proofprofile.net/proofs/artist/28b16334-8370-421c-afef-075faf184bab.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 0x224978d328abdf908c869f9c5b6751aca885a089897cce6255f737957d6f0a5e. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZMEN2065235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76367932b5eb3b81d139b76c26112e10d3fd137ffa04479b14fad8a70456a16. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEN2065236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963fc8cf2589677bc28e64a37a0dddc32e7d158cc818c92bec7f4e254d4f2f1f. 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/QZMEN2065240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687602845bdcb9ed9d5914a21ea82673cb2e86b710954ebeabca5b7491453c36. 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/NLCK42232227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5dbcdb9ba9414cc63c6cb2fa2fb0053bf641e57d570b1b88ff1e1dd074d93c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLCK42232228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cc39dd5e2081d20885a80c92da83a96ab1f8c7e23999746a02c8a734f73552. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/NLCK42232229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57d5d13a22219c2d47ed2c8559790deda17e25e1fb6690b09f595cf532ccb2f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLCK42232230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64659a6c4e1b37f2e74c06c9a977a4e030ae172ca3e777a8364bc7e3d84127df. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLCK42232231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9d1beb99578f0597d610e85f971a43e6209c4b001ef329aed188dde609ab0b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLCK42232232.
Deep Space Mining Vessel - Alternative Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b70ba8a68945865615c9dfaf8b8897df75d4ecd788b5d4bd8bdce77720ce8ad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLCK42232233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5a30351826127698aa15ca706f5391f230a0b64527e333fe3dd03ae144d5bf. 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/NLCK42232234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6b9dd03bccdf2f8b8836c6c4a5ff00313132ee2a78541883ae113536fbbc05. 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/QZHN82058200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe752d3b8827fcd214181b4f169d57163df32bff69642b4899821d08e1b223cf1. 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/QZHN82058205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3087b7b0aaa3dabcae3bcbc760c537d7548aebc194a2bdbe5758444851cc4a6d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZFZ52199329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0925acaa65475fc5d1029f4c9e04186475b0be74777498876a3c148681483b95. 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/QZFZ52199330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f0693d8c12b41fd31536a1cb6940462c8fe153b04294a7b9c52feaa25a7f20. 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/QZFZ52199331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d570a6550ae41e12a72a9779945e0ed1b18cc44d9cf7a52ec823260a11f65c2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ52199333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3eb3dc02f69bea7787ebd7b07d89020e54dda22937bc3c95312fc411c09ec2. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZFZ52199334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf4d59a7780a56edd662ab007470b79bcb0e30fae747e38ae5cca8c3b66fb0c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NLCK41088431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048b4ebe7598d34fd2c4278bcf67d6ca30db2bf96cd86574cf23b9280c571cfe. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/NLCK41088433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96b3a3ce90c4f0c12a0a51cbdfae695536802a07a639aa9bff89c84e5de5bf9. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/NLCK41088434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed376f101487a542de2957e77b20f89e07c45177d17c613590728e11ab103196. 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/NLCK41088435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5394bf9c12064b2d2b24f453a965b46f316d800cbd019664d3fee7de40318b. 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/NLCK41088448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97223abcb07442836484801e01a3f33c52494716d0750c726f7c488059c8dac0. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLCK42403090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1140214fb0a9a16ee219f21574166ccc38cd27cc5748355ebb56062617952c. 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/NLCK42403094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec0c58a872fb98df0c958bd65b303f48b38180609204af2eb4280a59f7b742d. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZHN61963001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300ae1a6770ce77c2b3158a7840daff7c69c525bfe8e60dcd948666038749ccc. 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/QZHN61963003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b06de2cb5dafdfff76802dd67a3ac2ee2ac772a2366e289bc38aa7b72acb627. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZHN61963004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bb13798c5afc32f7ef312cc7c61cdfc3bc61c91e9196ff9f4a353ee0d7918b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN61963005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d063cd0fd0d65ab821b5e5d9f9f11e1615956991c5f3a35f1690b61a22a204d. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZHN61963006.