Lilkovo is a mountain village in southern Bulgaria. It is one of the highest settlements in Bulgaria. It is also one of the largest villages by land area in the Rhodope Mountains. Geography Lilkovo
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 0xfc1315422b9de5c819a9c8d0cb62641073a5a3d4e7aee2f60a94272b5df2197a. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17169c6c-5bb3-48f8-bff2-a4aac98b5044.json and https://artists.proofprofile.net/proofs/artist/17169c6c-5bb3-48f8-bff2-a4aac98b5044.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 0x2f2818543b016f64cdbbfdbbcf02a34d1b2678c53374d5f6e06ee79cd9140d70. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ782469093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896f78f33a4cd7c3c50e8ed88aa7432fbe7d4865c97d3be577657ca203354ebb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ782469094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab28c18377140e0cd8c1a427c5b523a81decca9d21901b131f719570d5a63899. 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/QZES52593105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e83d509d985b25f49ad43a16a10ee38dd06161204077cfa59829fdeafc14f9b. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/AUMEV2593298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703d586bc6a01d0a69d742b8d4d1cd782a7f49f5f76b81520b616fa297bcd2bb. 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/AUMEV2593313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1b6c9e323f0fb528eb16e29a7ff117df808866d57b0ed1a74bbe0aed72afdd. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/AUMEV2569021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff51d7ceb67084d5017be60f7e6d167d6539f1179babe7b8d007a6e431d7874a. 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/AUMEV2593315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffb933e8dd8a5737c658035b4cce0ce4e7d40a5bbb39e06bde818aec88bc800. 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/AUMEV2593314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ffac5697046db9bbfc3d1545d43238ef8c2dadff2f7a09194dde04546cba42. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/AUMEV2593317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc907934eaff9988e49a77d1d1f2385bfe033e05ea7ef67cbf2f64ad2a52e1e62. 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/AUMEV2593319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9ef92762779e512d0bfb9dcd33637cfbb985ee0b17567bd1fc5680fd55ccb9. 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/AUMEV2593320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2992f8e05778679994d1247387966ae2e794aaf131dceb5463c8304f7539dddf. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/AUMEV2578012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840d55392af248c6afe60b6b25d3f529d76ac1c87a1e9973047b25b46e86c62b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/AUMEV2593334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde55f97245b5770ff7e5198052050aed21ed13c2f05ff8014c2723d2a01af1f5. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/AUGBT2547935.