KFS may refer to: Businesses Kenya Ferry Services, operator of the Likoni Ferry service Koç Financial Services, owner of the Turkish bank Koçbank Medicine Klippel–Feil syndrome, a rare congeni
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 0x0cada00b086a4a1d03b518ae212bca4fff5ea734042482a10b8a17d2dfd1f45e. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e075c0f-f5f5-4ffa-9641-26d8ca849d88.json and https://artists.proofprofile.net/proofs/artist/9e075c0f-f5f5-4ffa-9641-26d8ca849d88.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 0xe1e29e58e2ebb4470f5078482e8b2e97c37ea003f33c64b16d36fddb38f8fcaa. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ESA011712352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fceb3b69a7f44989e9adbe3876e0b1e5c99f8ba7d0f7774f1a433d35abdc59b. 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/ESA011580120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77f83cc57935c61437d4566a6d5923b1091c08f11ac866cd213f082df22261a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ESA011580121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0810779939013b2e5234be60d80dc147e0b1dff76964dae2e7aea864d89f076. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ESA011580124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d5c947a15ee5192499c14518c07cb06e8ed87bd90a2421dca336ff3f03e9bd. 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/ESA011580125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b635ec15d956f18d002b0f28088844c11ceb728ebc7cd926414f16a842b3aa7. 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/ESA011580127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad252ce61a99297bcb23ed615b498206f31d098b65043190f5c9b3e6ea621e7. 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/QZZ7T2454498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f33d44a81b25fd0f725fc8ec6a7d01768c6ea196fa13acbd103f6e0ccb8f9b8. 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/QZZ7T2454499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d1a622f17d7e166adf7b1d985a533212b3ca5d8314b159e1de94fe02bae9c0. 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/QZZ7T2454500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39733b2568aa1203207546a75b3c204eab64c4410481c1ce1becc2a2c95bf86c. 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/QZZ7T2454501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c82c2ff7baead12176ea6a9052baa0c16429c1937530ba2645a47f61844be9. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZZ7T2454502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752c90bfd76270cb985975afdfa90f68b1b01b562345a74004bd367a238df326. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZZ7T2454503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bbd750b63ff585806159d14e1ee126ffd8c98f97c7568d811fc31988c034a3. 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/QZZ7T2454504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3541a6d7f7dd15bc9373bd23b3112ef1d969e18dfb501076231807111c243d4d. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZZ7T2454505.
Live from La Santa / Izaguirre y Eristoff
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c6464b3e1f1f2806008eb00beca2424d0649d186ea8aef8e053557accb5823. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZZ7T2454506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b688b1d150e90e26a3f9a8513a3379ccca44d0511fbcb336d7e2ddf4f27f1ee. 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/QZTAS2107365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bcce846f898063e2acae9eff07d159fcdf314f1f57363abb01905887c3ab7e. 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/QZFZ72270801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a299f5e16d4e0fc59119fa5557bd3e0f0cc33b44f49a5265794a4f60e00fd2. 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/QZDA62200324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d1066430d042a0729e7a1aebd308809faa9445026ddc7736dd5ac10f99feb9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZDA62200330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30253f57a2c986b649555b05afe92735942c7647a5b30b14e6ed2f91dd5e38d7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA62200332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf840cf833c4c9aa14a6e3e5bf8ba6be1cc700d2e876b847e4cacd472823c8f1d. 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/QZMEP2480915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11de332ca51970d4d414a4b8a8ffd7e99b4e768b0ae007ec535bb7457bcb8ea. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZMEP2480916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2f801fd6f8cc11d0835833783cffa3fcf2b33fc9835553c6fac1055982a4b9. 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/QZMEP2480917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6192cfd7016355fe3367831dff6abd0454d187cfaf8cd4fc5e823bf5a8d043d. 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/QZTB92344583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98d50b92c4a000892b590da49e1b92eebe042dce175fd3ac46b1a2527431f31. 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/QZTB92344584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb68695fb1e1db2561a9bb0ff11cf8f5395a5d7dafe862a06a894df72637d87. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZTB92344585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab23a4a439155d73d2a785100fbd476d7c360a557ae98af9ab23b9429d43d37. 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/QZTB92344589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4165804237c0915a3334032b89d2dea15ec90c532b785ec36413b10c36177d34. 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/QZTB92344590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef82a6f598102af13d49934844b06cd6bee785271b9203624aade5ce13bb566. 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/QZTB92344591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f713ae74bacc65bf7dfefa759a3c0e882ca91b6b464df2f525f97e7607fc2c. 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/QZNWW2185106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22f1b468f7e8693546195d1e4a8fede5e0fedd45cb8abb4f230af4726c834a1. 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/QZ22B2032112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130fd4ca773410458f8e486a3d3ec0e5058cdaddf57667e47e8830250a76a8af. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZHNA2550091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98172e89ab2749c7c9907689d29e57163c56642101b484d56c7e58ec40e7e834. 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/QZHNA2550092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb763175deb5359ef4c0450ceb62b3c2b99ed87610930db9bcf67f6563dc7584a. 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/QZHNA2550093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19168a6088a076acc5064ed31b31aa7878e05c94dd682085a8d28b643e836397. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZHNA2550094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfced015ae41fc489c3ee93e63c0dc797679cfef2076b39ed90758e6218baf421. 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/QZHNA2550095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3724a4d629f3255387fa4598122e054f60a0c43becbc7100b5f4ccd64481c712. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHNA2550096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625f8d349530e5d8f854de7798b25d8b6e5ca1512ddf274ade737e6a25c9c7dc. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZHNA2550097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba93f36cd23f9382f5892645878a285fb2206c3e6e2c30a94ec21f2e89e18bea. 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/QZHNA2550098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ecfe1ae3ea7a1442f5a2cc911413987596346676608dac02b812a4d25d0b93. 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/QZHNA2550099.