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 0xd8a114f5f47cc1d3a16496505cfb48fe395118d2b8bacfe1fbba26d3b0badb7a. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2efc9bf6-b19c-407a-a0c5-a4585a4c7afa.json and https://artists.proofprofile.net/proofs/artist/2efc9bf6-b19c-407a-a0c5-a4585a4c7afa.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 0xcc72f792988e4712dfa421a16f931d06f975c5061efa643c47cab8fe3cdba5a9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USDJ29400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1728d3c35bf32a475702d70a6d7510d2495c550e53f80fe5c3e1d7c8ae28e2d7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USDJ29400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11bc4f0bb9cb46a016bbebb499ece8f0e053b988c5c4ba570e18bb03d2ac639. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USDJ29400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab7e66707b60bb8b269e78e1c342ecc148e9e0f8fcb1d137977f3faafbb04d2. 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/USDJ29400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50d9eabc612bac801a844a621660aa7c66a3b0ece3edd5c080c81fe5e864d7c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USDJ29400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d0febf334c650794c9a96e4935bb9829cf0c264836ea870a94e72971eddcee. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USDJ29400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2219d3da250f7c07b2e42dbe72fd6f7c5c1bb68a5b5d260b5e7d8e08c4837ba8. 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/USDJ29400059.
6ix: Revilationz the Flatline Metal Sessions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0aa31c551c4421f49169664289e2be3dbb1d92f0f68ef983681c790a1a5ba8f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DELJ81622187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5addd025ced923aba304aca28a4ee9baf81a16e814ecf15c4f44b5336ea9630. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TCAEC1960070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50d9eabc612bac801a844a621660aa7c66a3b0ece3edd5c080c81fe5e864d7c. 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/USDJ29400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab7e66707b60bb8b269e78e1c342ecc148e9e0f8fcb1d137977f3faafbb04d2. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USDJ29400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4850d6fce5a1ca05f4e1f1ba58657e30f23d178a4cd7147507c0e9ae73ac5ef. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM81878502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8e0395523f8865bf122c0558342d15661e2d8724b651470e752d30f729771c. 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/USDY41675559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0702cb9b8df1144e9380e5b3210363946cca646afb8cafd0cc513bc178ae6d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZKWA2321690.
La Cliqua (Double H Production présente)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90d8470395586289ff69c70117530e98f2b58ea6af28c9ff84e6ed9e0a03102. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/FR6V82196317.