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 0x9340ee4482a6c16da1de1de62dea45f3493a23016f022fbc9beb2deeda20cf49. 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/d8021a70-725f-47df-b6ae-f69cc50aff07.json and https://artists.proofprofile.net/proofs/artist/d8021a70-725f-47df-b6ae-f69cc50aff07.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 0x73f0819e7edb11d0784dd2a5996c82d6155d9ded1bc14ebf9773f53df0190f9e. 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/QZK6P2204562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edce6b9ded5aef6aa2ba816d00f11206ffae895df333b0560eeffdd901fde8a. 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/QMFME2135496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2ab6a91c4bd2f73edc9feb37356db0994645a1b6bb424a7f24a28537cfbec8. 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/QM6MZ2174426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1c74a75a8eef97da5a82ef19fbf3a8b391598e695f61038fbdcc09a21c3340. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLPF0277934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead9b847510fe14c2a273cfcb51b10bd416e69c8e1fe9bdf81f260f9ff805bab. 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/QZDA72072711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea80f64d892a6bee70debc43d95699113db479614032407dc59132ab22c355f4. 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/GBLPF0249911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30ba7c700d6422c3188509e648b395eb5a0cc65df2409ac6d80643f73b28bb5. 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/QZHN41915584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ac5ad3a478cb1d812680651cf299c859763e6699980a2e835ea7a55996fd89. 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/QZHN31971423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3d093978541dd08426aa70345d27cd7d41564460d0f16c8837d3afd2a5572f. 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/GBLPF0244371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4395b47b46159c43263cd21f7d5af3e9b03d32fb37fab95a8556f9794f9323ca. 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/GBLPF0244368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afa5174544f621fc50daeef8cf2d2b6de01efa22a005a8a2816e2cf6e192709. 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/GBLPF0244370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1042538bec16ae927c44b29104897e01e7c1b781fee14f538d4680f06b0e96d3. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBLPF0244369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faa5595ba75806813c59cdf99ebe8b1e8bf36916f06086d5f1a1979d8b5c714. 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/GBLPF0244410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ae0661bdedd793419bf7d79057c0aa654d04b65ff2b7dd363bd2ab7f58c365. 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/GBLPF0244372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3d46af1105a6f0203aeca15cfb766e773c007a6bfc000c08ef98a77e6d66ab. 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/QM4TW2392452.