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 0x9a648e3826c622a3dcacdafe7db8f05e850c1819e41c0e031edb248814aabe03. 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/24259701-05b6-44a1-8eed-61caa35b1735.json and https://artists.proofprofile.net/proofs/artist/24259701-05b6-44a1-8eed-61caa35b1735.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 0x1a50f176b926454ec44ebbd54c6e6163b5b17617adf2df64b257a2bbd2429c9c. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/ES5059001032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a1efeb1ad8f485480132c2cc9abf5760de12b982e62a972a0184df03c643a2. 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/ES5370200424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9df3a319c64ee706f1d03def6b9c73b14a125011574131f077be3eaa6125a0. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/ES5770602543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112966ff3c52eb30c12eb7018e06971b8a560571b822112da21ccc32fe0fd52d. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/ES5770602544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba70d001fca83fa716e1c4a9704e8e3945e832f8aae1b37a61f54825a369344. 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/ES5770602600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a18b0b68dc6f6c1618502a3b78f93fb3f1f7783449a92ae5674e83294c8a37b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ES5770602602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174721d3da0ab879ea1218aea0dc291e716b05cc1806a9636ebd28720e0f24cb. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ES7580800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fa42722f68c42b3471e227beab96175c460b2c4ba36b4492c600cfbbf9e9b7. 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/ES7580800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddd20d6829604b4c7d4fd1346ddb8654dcba95814ab5a9063ced5798ff8e757. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/NLFL71600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24eb8680a5529497863f2796165c0ad1f8eb8986d76809f45c7d888952fc69c0. 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/NLFL71700084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e933e2bcbc463a005dfe297e332fd130412faa1ca3397b11b5808433d3d3b2. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/NLQS91700127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c627e9bc22f8c7eab2ff122d9b1835299724da9dcd8e685cf4a3acda89b5eaf. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/ES60B1800147.
Masters Of Hardcore 37 (20 Years Of Rebellion)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee2ffd03a3b1811409709f424c6dc4e5fa38f53914f46a95e38e003a8934aed. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/NLS241500176.
Masters Of Hardcore The Conquest Of Fury
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7a6b5cb6f2aa1745a0eb21641a1f38e918c6045f6aecb7db3ebf6a6157bbe5. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/NLFL71300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc64742e2319916f38a9973da2b253f77f502d400e5862b89a6da6d3dbda461. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/NLFL71300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59065b780dabdd9b2a8f6520fa6a2543c971c81d89c2d22e88128c32eec364f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLFL71300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8af9c86a2102b78c5ca4273fa39bea737f6de08cf8bd640c762b61fb1060c5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLFL71300039.
Masters Of Hardcore presents Masters In The Mix Vol.1 (Mixed Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf61c71af06f6db14e2af8f1c732da752db5626614e84899439a482524dae65. 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/NLS241401826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea56c4284af1c5b573323ba8b301eef062f9a3270e4d97a34fdf2e0e18660ff8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLS241401841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddd20d6829604b4c7d4fd1346ddb8654dcba95814ab5a9063ced5798ff8e757. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/NLFL71600017.
Masters Of Hardcore The Torment Of Triton
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701fb34744ccd64cb74c40368bc16a4f622bf73217c44c3cd0c94c23a1319fe9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLFL71200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc142f773c4ed7e99b4059c31fc7360852f9e5b8c920ccb1bac523b3adb1e1166. 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/NLFL71200066.