DJ Layla is a Romanian music project, produced by Radu Sirbu (O-Zone) and Sianna. The 2009 single "Single Lady" (feat. Romanian singer Alissa)Rock-ul, cenzurat de posturile româneşti de radio won the
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 0xa1588f0d69e1d47e6a71fecaf3d73a2acd44556669c3dd36a48473185338fb4d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebc392ad-03d0-4257-ba22-51a5d366564b.json and https://artists.proofprofile.net/proofs/artist/ebc392ad-03d0-4257-ba22-51a5d366564b.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 0xd2056653408076409973e13ef4dc2162a9992ee2237452e2333ff7c90f3f1451. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR59R2466694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c258ed8dab1c8213e3a867fd7a01671088578688efdd563879dfa9da046b0fc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM22296073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f37fef26000f055728d2b3201b61b3bb6aa12090f5872afb398afca7993987. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGJ2260765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865d4428e8f7942f4fed26beab2fc4e804ec774973aa5d2a695c84815eca6c8e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDY42124445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b920c20190c2dd94893677b1a64f52e3326f5164ec331e154e5c7723fe4b0f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM92023650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343231777e90e9ceb50f2385ab81baa4b2a266da860674db659e156900719b9d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCGH2138922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e55cdfe290885330c7e9e8fda11b0ee7f38fe32842d0d51c7c581affc9cb309. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDY41912535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc677e8e7e250a4090d0474e3ad8b361c84a75d3963350d1552c0afbdaf2cb6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH2097696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3652d597b96a73f464bb0efe9041be1cc86bb4f0a1ffe75cf5a02247a07f64. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USHM21942476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe919ba0464b546ef8eed4a5f95badfadab26fd1daf2be02af92c35b180a75b23. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM21942475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e54517fa4f8f8292cfc0a5ad7a6df8815127a9948e5896c2cb68cf1b615c0a0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USX9P2004312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa524eb9f01f93405a01383f1ad0ac070b4b34137ff54cfa5f2040f84873ade1f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM22031841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c57de1f57408b2c43e0a81dd6fdc008487b84fb3ba1b10931d61eda2fa1ee0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USCGJ2012572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3437b1e3646eaff64677aa37ba5eed129584410062aff25659673eb5e17347f0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USX9P2004279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf67d083836f86bd16b8352821d195969983d47cf0f4f0c57686406bb7706913. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX452450924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05d5c5443599a8ad89d9f191ee0d8b75b2a62e532f59bc411f9c3ca065cc697. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0Q2300237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ab8e619a5725b4dc679c4cf5e76c7bf1ff44c9af7e1265393f15cd237cc2b8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA0M2382365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18283f381069f9edbe940811248789d17eccce2719b21b48226da9dc9feba391. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX762322971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a5546e2ced7a3b4b24a04de74cb213af098d8085cac5f948f48722dc537a46. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:45:01Z), 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/FR10S2472958.
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 0x000af14198e470b738f789006212edec19e4905f0e12f84d88c3d7a5726f4600. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USHM91923898.