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 0xbc61048c9afde472e93dc5214d8e682f9e9d74e99e6318415ad4113288a53545. 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/ce76a2b9-e4be-471b-ad7b-89057d5f61a3.json and https://artists.proofprofile.net/proofs/artist/ce76a2b9-e4be-471b-ad7b-89057d5f61a3.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 0xc99662a44d7ef2bec6c7cabee76a07d0df9717db562da1372fe53c179980defd. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNWW2234852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fbc02a549a0fcb864d7ddab7ceeb24e2fb14fd65992078e7663dc7c4c381bc. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZNWW2233417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d7346731dff79a50fbe1c73e0fb5a76dd9e2ce060169c98d3fd8c07b3e2e11. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ22599838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5320236581527f3f636b3d65ce916636f34464eb128899c241e56365ba6b1ee6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ22553054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3374bdeca9b9121986b442c0a6fab98037fb0a495a2b4df5b3c6442b0882b56. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZFZ22553053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3374bdeca9b9121986b442c0a6fab98037fb0a495a2b4df5b3c6442b0882b56. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZFZ22553053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe70a641f583333eefbe31be598f974e1dc62f0e8fadd4a98afe9b25614f4f2d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZFZ42067350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d41377dddb04de9d2325aa6e7617c8f2003f154763ef966460a995ff90dbb97. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFZ42099051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1724e3a1b6b0e1f7847f84a669a21bfa853f18ee5ddd585d05cb87123673ec5d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA62080011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c46bea286238cee7ebaa530d9efa6bc33dbea26cf0fee079102873f36a543b7. 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/QZDA52077946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8edf56dc56ba6c7a9e70136a5ce35c818c4dcb81b81adb1b07ab59ae68474dc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZPLS2103495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7044196b5ace22b76f3295405c00bef6228ca40a2a51cce0b770a16ad25fcdb4. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZTBC2423445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63521894ea4b948e75e83e46fc0a167a448005b2da9482ee00cb4556dd97d0a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QT3F22466477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63521894ea4b948e75e83e46fc0a167a448005b2da9482ee00cb4556dd97d0a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QT3F22466477.
Noc gorącego lata (Dee Jay Crash VIP Remix)
Noc gorącego lata - Dee Jay Crash VIP Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc207ac4b6020211b6336695786e8aacdd2194647e17747dcf3266139db541e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN82512629.
Noc Gorącego Lata (DeeJay Crash VIP Remix)
Exaited & Rataj - Masz to Coś (Radio Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e9260ffeca9ba4c5dbbdea7047a6c1fc59bb9881ba49a23c84f88fb20231c3. 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/PLH751800060.
Składanka na Sylwestra - Największe Hity Disco Polo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb89837a741bc0bd036941a78ba9148befb748847faee1fb9549d206e1412b0. 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/PLH751700004.