Kristian Radoslavov Talev (; born 11 May 1988) better known by his stage name Krisko (), is a Bulgarian recording artist, songwriter, producer and entrepreneur. He is signed to the Bulgarian record la
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 0x8dc6a7f8e643a5ba722c8b79b8da2f47bc0c862ca2e1e2541b93707d2e4aaa2d. 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/83dd77ea-bfa5-485a-900d-4b1f0374f381.json and https://artists.proofprofile.net/proofs/artist/83dd77ea-bfa5-485a-900d-4b1f0374f381.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 0x2d6893b3f6d956e4304b98ce817019c170c73f6a040e8dac27bad962d95563ef. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/USDHM1221426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20555320ab8b45cdad058a84efda4ff4c59ec4283074f0fdfcc7b92132730577. 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/BGA741200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102c49d0e99e99af95b195bc3e9ce39b4cc89537835711551b81e3d2222c15d0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BGA741300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a2c7598f07616e252c695f333bea3a88812d859e76c5d6ccff81058a378847. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/BGA741300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21020b4136c0dbfd357d8930267e8ee4c24534c44efce274ea42c8c57a47300. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/BGA742200917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34890c82641ee3443d90d1b7b5be1e7cb015158777d99356347b4685c01c738f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/BGA742200920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1522924dd725cfb6ba10b84f8a9021b083ed2fccfabd936da3fab9577816e4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BGA742300950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d40b25bb4342aac9e779ea0fb1eb864129d462cbf29f9c629c397cabad3792. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BGA742300956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7814b919ebe80da171aff2cbc011f37854f9298f98dac4b4434a64219537f8fe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BGA742300963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d854cf3b6444c70333ad535379338753e53beb25aa7e3727d21c0278ec8bd94. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BGA742300964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa922eba9b1eef7de0e8c00de31c1bfb29e20e591dd9a26845e752141fb0c1702. 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/BGA742300965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb461499435675678c2fb16f6d25925776f8a55157956eab9e1d51beec1ce8292. 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/BGA742300967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148489c7d97392eec3efc3d34926a6c730d45a46b365c52d5e9fa9f6bbf81e52. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/BGA742300968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60faaf3c743dcc99c83d3f5db9d464d663988b06f68adefeb03a943f5d39e5b1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BGA742300969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1522924dd725cfb6ba10b84f8a9021b083ed2fccfabd936da3fab9577816e4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BGA742300950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d40b25bb4342aac9e779ea0fb1eb864129d462cbf29f9c629c397cabad3792. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BGA742300956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb7b168f78d38c38ec58f2c8fe91b353fab9e8d028c5c7bc8e2f80c0b427d61. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/BGA742400977.