Maria Ilieva (, born 1 December 1977) is a Bulgarian singer, songwriter and producer. She is recognized as one of the most successful female vocal artists of the contemporary Bulgarian music scene. In
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3102c1d9622076085218f8edea78fe42abfff9bbf2e436880805d8f2aff92692. 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/bf201347-c864-455f-a3e6-ffecc3b28b39.json and https://artists.proofprofile.net/proofs/artist/bf201347-c864-455f-a3e6-ffecc3b28b39.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e2226f3d68613176ee2473c082599e6ad121ca4147b9bb260bd41d1497068f. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:58:11Z), 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/USA370915686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe874ffc1eb6328f129d4154d9be4490882fa149487a8807fa6f2004837291988. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:30:49Z), 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/BGA0P1600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9d6001bb85983127935c534be084de73ccda6c6a9638cba15f11a51f9198bb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BGA001500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc88ba868f8474a1effa6a10564e922f01309da6a2f2800315cc77041dd57255. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:06:25Z), 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/BGA001300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5794993241e70f841e4b5ab5bd98f54f2d0c368975e52b34169614177b15f79. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:02:35Z), 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/BGA001000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892384c319076b130a6b4e1af4ac931b0138ed52e55a9a41a9c9fa76ceea6dea. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/BGA001800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0297dc974dd97beeb656064241f66c472bb204d845e711c864a86d8c78f717e3. 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/BGA001800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18efe78963a8591aba81e854d727074c556ee83aa13e62da9cb301b0d1510b8. 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/BGA001800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8379b16f037cccf740029eaeb5bcc2d1b22ddfdff61675c25b56b12e5d585d4a. 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/BGA002100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5a12e6a37f239386fc5eb99321d1b7e6e80c1df366a56c23fa88eb36496f1d. 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/BGA002400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e35ecba57015cae20f436a5a532291e53fb6528deebef274485edbc0a2805f9. 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/PTFA11201800.