KC, Kc and similar may refer to: Places Kuçovë District, Albania's ISO 3166-2 code Kansas City metropolitan area, a major metropolitan area of the United States Kansas City, Missouri, its principa
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 0x9c7b79f92d12c460a64312be963230a02e0aa198816b58d69b604e3830d55a89. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c11dc473-1b3a-4701-b774-02943381f1af.json and https://artists.proofprofile.net/proofs/artist/c11dc473-1b3a-4701-b774-02943381f1af.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 0x5117e42afc4b21d089e23e8e28d99009e7848dbc97812af57a22f2140082de50. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NL6CS2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72ff0545d60d7072391d51dbc0ac92c4586dd0f647bf603f65d14b8db9f1c2b. 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/US38Y2405332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf316016fde757598aad9de62583e99ef226e59bc550513d245f6c938387a9cf. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/CH6542215063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99054f6510f929fd345d3c3c570f5cfb85f2c14d21269f843e4b509789fb7cc0. 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/CH6542215060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a39d2c4750c98b37d74ed3707b12034fe7125af5a0613289ae2cc00632c2b9f. 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/CH6542215061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f05b48f72d2a685a1038b435a7227f953833f1189e2b7bd11df8c37aa1b3a27. 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/CH6542215062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80425b6e229a2524d4c9483513a93d501adfce4ca7d175126bd0ecb7a0fa57fe. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CH6542215065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4524381e1c149d224a9c586f0f7722b274394bc8931991c08c8136f20e5dd37e. 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/CH6542215056.
Alles Wat Ik Wil (feat. Josivnne & Delaysa Nachia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69764317a351213f05566787b12004fc993c816f6ddfcaf0d5c2e8c81672ce73. 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/US39N2301713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80c06f6047b20b59728ecb72ab77fb1c8df1692f83798d9936d19be809636e0. 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/US39N2301714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0ae3399a37021c6c748309ae7a3f158b3d8b599ceae947032ae4e89e37e26b. 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/US39N2301722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c747000035ba1cfccda195c244738ad0802b0c94a9d9688fdb0234ac5dd0492. 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/QZHNA2285518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee381e3c571be42aee7ec736ded90535356af833e5d8d522aa0f7998ac824d2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US39N2313746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33ded7923ee640046802db629b8f09f9769a09fea652eaa54d95f0a13d2bd11. 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/US39N2204784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0d6dacc24a727bbc90f7cdb7e932d5417ae1e5eeeff8413459f4f6f54826c0. 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/QZMER2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01e71111df9ff98358a38e5ba334c37d7806dea3645a7badd85c2bf2537a778. 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/QZDA52247246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4685866e4a1dce2a640c854bcf92e4687a696f7762c5bf632103c16d7ca0c192. 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/QZFYY2287477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebeeb36037fe30cd4d9edb03d0d1962b04d3a27882ae51d97b1650d8c024135. 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/QZTAS2170759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304a8cfae6b14164cf2335609f43dcabef8fbf2c8b26bec030edbf44f73ad262. 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/QZNWZ2190264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b5dbcabee811c885b8c1a836358768a71c4629a6b348a652f659538af0d39e. 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/QZNWQ2144959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d42a952fbe449a138d68cfa151cdf9c211d2da154abf75c86711a036da0d65f. 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/CAN132200281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246ed102f05155a6d80103ae3bb195c6b2661d75f50e1fc72f84cf5815ab8ca4. 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/CAN132200282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adb58aaaf09b3376f0575d02a72f2b9cc2477668124a502680a8970b7d48844. 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/CAN132200284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e79b126334f17f22400f0b18f53479a805db99dc704dbcbb11580f3e9a6059. 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/CAN132200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d45138150d2946fb55a1fb6c25b3eaf33cbd9019b3f71ff9144fd0ac60f35b. 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/CAN132200287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe114169fb40f3ba8d28532bf1233e0d82ca7b063c4393d9d464b3a77c7d6ac33. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZPLR2113957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe114169fb40f3ba8d28532bf1233e0d82ca7b063c4393d9d464b3a77c7d6ac33. 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/QZPLR2113957.