Aleksandar Janković (; born 27 August 1981), professionally known as MC Yankoo, is an Austrian-born Serbian rapper. In 2014, he collaborated with Serbian vocalist Milica Todorović, for the song "Moje
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 0xb07dcfe46b72510977074dcc3ff1d43876ebc601966f8c4a2a9ff578e2dc2eca. 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/2e6bfb5e-0f5e-4d43-a8d6-061fafcb4e36.json and https://artists.proofprofile.net/proofs/artist/2e6bfb5e-0f5e-4d43-a8d6-061fafcb4e36.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 0xd0759d57d98b5299bb4c2b717333a8dfd286ef36f95f53b280b4824b5414ab17. 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/ATB351100140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088f34a177d2912ca943479cecbbe4437bbbf49c8507ad8d11dff4e11438dc6d. 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/ATB351100185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33e7066cc73c21eef02f29b40f9b2e5f2d08df031109ad7ea6f1348a696f08a. 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/ATB351200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa020c7241c1365c5e29c8aa5724b428e8c8e55344017b9fea8aebc77ced352. 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/ATR981141035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd640430e1c137aef6195233d147ffeb7189294d0d0d86ff7b728e97842a15bed. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/ATR981141539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ad9aea27981714e351cb016789fe32c6309cb47e5071e1758c824d03ccb365. 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/ATR981144649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157a3cdbef7db8571f11dd1a7c0d4e5b481f960dcb0b3447fffab5e9ee2a14b9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ATR981148739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea3308d39a8119926d7f44e9607b990b251e0ff97540ab493d032acdafd7aa2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:18:13Z), 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/ATR981159161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792b2f86269005fa375d33970c7a16065d65fc291a8a584449f84a07e7a41c73. 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/ATR981164176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367cbcd0c025b813eeb0947565f405dcf36a3edbabeac7d68b4688903b301635. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/ATR981174735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0cbe02f9fdb75b218782acc1103c6350a2aa926460f6532417374e58f8f5c0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RSA221701358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c11540af04cb2808674f45e815284d2db34d33004a051a56a693fe2cdddaa7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:24Z), 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/RSA221900731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2201333ab1a835c5938dbccc678eeb60f56a8e40821eb9f2e48257e3a063f901. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/RSA221900886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c96ff0efd44d9a924dbc2cb39769ce3a110969260d14536d1c31b03d66fbe0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RSA222010462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59240ac52f148094fe0229b7cb407e8f5f0103c4e6a33c5e8aa016cbb3f7cdd1. 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/CH7812071169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa814b21c0fc689095b99272bac4c9329fa4e27aeb2ec98dc148895f9af6d5d35. 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/CH7812071474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8eddf8fc0318ff304dbcfe7682206a66e0c851fcc04940f444ff6471a15a66. 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/CH7812071477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde27a6dedaf64778df330a049e1fcf653e8ae99f87fe6c7c5f7454ccf3d875e6. 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/CH7812071479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ae4dc649a7e3e356d2d2830a0440ec75a11d49c64e18169923e313b2e71708. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:10:38Z), 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/CH7812176320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cf00971a20a8129e7cd302250e2a0f4243f2f24f7b32b457e25cd19d3e6a19. 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/RSA222100137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab1354c571d1abab0f0e62e8c1d13ed596cf58bf4aa968d5da93880676f7934. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/RSA222100185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe10f354db41cba0cad18779fcff08fc546ab18fc34ac4eb5b0dfde1fd502cc. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:55:30Z), 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/RSA222090989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef8bc11f53ca0961a3def4ebbe1ecd2e3badde5b356e6216949110548d8e4cd. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/RSA222091078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6145a9357384db9e07c6eaf6e1b5bd961790abb11c9a18c4fe12219d46ceca. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:27:05Z), 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/RSA222091155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598b26d41bf8682e67cdba3211ed0bb3fa94bd02c0a9c22026886acd3cad5623. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RSA222091447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f38a5231a02cd1579eb3a981ec2fa0f901960aea8266706ab32fbc52ac7c83. 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/RSA222190764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29bb26452702e38d828ca684a748d68a5d7075402aa1e64a73bacf2a1dbe9ef. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/RSA222190765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb295d69e4b30a26079885729dfe44e29c12c8fd1ef8afd22c2e2f334db840f88. 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/CH7812344057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e81bffc367879e484c9996a2aed583e7bbc8cbbf83c0c23abe4c102e94c660. 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/CH7812344067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d4edca3691353b5debc0eed1631d577d49d28a781a2ba8258748ff912d007a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:30:38Z), 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/CH7812350049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1554010c50f974d27303d40cd2cdeca9b4cb48cadc2b5419d577c9b59cf765e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CH7812367670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45cfea7e1f96f55fc21c394f1c052f6d06bbaac3587570405b751e40a62021c. 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/CH7812409410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817b5dcbd2f81a5a80964c60023b3aa1f05e03e99af406e6e3a594e1943e3b05. 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/CH7812411089.