Mitko (Cyrillic: Митко or Митько) is a Bulgarian and Macedonian masculine given name, a short version of Dimitar. It is also an occasional surname that may refer to the following notable people: Give
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 0x98c42efb66e4ce757d02a5da829249389b1ed343bd995541fd1005df9469ce87. 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/9227ee04-cc0f-401c-844a-1d0ce528c918.json and https://artists.proofprofile.net/proofs/artist/9227ee04-cc0f-401c-844a-1d0ce528c918.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 0xd6a7af6cd12ba5b19703673d4b83439e6c3d2fc1e312cbcf5a15283d4e5b8b1a. 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/QZHN32595996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab1c54f89d5613cbde6fc0bccaed6802a7164be9db463eaf2a42ee7d6156fd8. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZHN72571850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd16c5125f851647892e53b7b8a6d0852127f4d2d845db0ef7f04f16774dcb3. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZHN72570597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c655fa1f9c49ca47b8f1cdab15a5755d093cb12772b8222dbb1a2dbc01690a6. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZHN72576853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371267891e287a214766b8cf51ebb7d20c18658fdebfc923d8546ab042badead. 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/QZHN52519340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb90ce65860985c4e1362fbc69874e3f2177a43bd50895fdf898d64212e3ac4b. 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/QZHNB2547201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf32e942df2e6f746f9afc55a02a5820179d34bdac79f1a0f05e19f0cc6e8d8. 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/QZHNC2536055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4444cc7f65c5ee4ff292e8e0b645987f5a2b6527103442015330b6a00c9f058b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHNC2537837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8f5a378a835e4154b55739ae00fd0853fdaa480ee4543635297b2b542bf99e. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZHNB2536937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c239f929f34c94c1532cd3ac509d4f2eae2787c06e2da53ec05f958fe42ad3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ7X2551708.