Kahan may refer to: Places Kahan, Pakistan, a village and tehsil in Balochistan, Pakistan Kahan, Iran, a village in Razavi Khorasan Province, Iran Kahan Godar, a village in Hormozgan Province, I
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 0xb61a432df2fbd7e8539674b4ae82b19f3b3b2afb2c6931c15a43e3300cbd8cf3. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e841ff1a-2195-4a66-abb5-08f924633890.json and https://artists.proofprofile.net/proofs/artist/e841ff1a-2195-4a66-abb5-08f924633890.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 0xda71d671ab57c919fb9c98b56a595c0f7a42deed8a704396ef6affaca3f47445. 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/GB8KE2405586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb69842600aa8037e940c78df054600b79ee7880c62decfbb5ec92e3bdcf1ac. 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/QZMHL2423366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f07876832f61582c1bed9dc38244cbd9c1e663f79784065da7c5724f2053de. 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/QM42K2461278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8540fa7061170111594aee5af35a347d21e724106ed7498523e679956201cb81. 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/QZMHM2454616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a70864ed4dc0f48e211ced2dc1d1c62418ecc6c0d07052f75b28f3bad8906e. 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/QZS642403218.
A DARK TOILET IS THE ONLY DARK THING YOU'VE EVER SEEN
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdca3858af5cda006d290c682a7ba5b1a593d3fb6a12608eedb5aa397833185. 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/QZFP52361275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e6a26e44e126d2b13ddf4c2f1472127f1114270cd3e300e01f5da5f471755f. 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/QZS652473580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1efd95c8a791edcf2439babefb17c299ee9fba85c3ed5c0291df65f317989a. 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/QZMHL2442638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8e4be87979e347abe7791ea693e269eab41e148d07d72c5757f720c824bf72. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMHL2428542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfedc3c8bad9cabe09bb8321268e34d12e6e7fe918059d5a1031c0273f5621ae. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T17:01:39Z), 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/CLKT22204218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3817937410ca452deb5e1c4b2b5b803d6c20407c4c5ab74812e9f44cb97f6f. 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/QZS662466877.