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 0x8561d269b490dcb5f701d2b93ab68c49bda27c2e0153980b299926689dd819d0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca346c3e-d0f4-46a0-bd1f-3556730de699.json and https://artists.proofprofile.net/proofs/artist/ca346c3e-d0f4-46a0-bd1f-3556730de699.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 0xf6cf3728f3a4cecefd2d4b40e5889d26d3e2fa21b7a6f58d3622ce8cd8b6d9e3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFYW1913242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4967d3795e24f93dc3729c3067e51a4bdd514ae81579fc1a58dffa7bfe997df. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:28:41Z), 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/QZFYW1913246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f2525c469ebd23edc2168923f9133f83951592047cb7c510d98a438aea5152. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZFZ22054631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee64b7fae0e8c8039722f45a816199b31addbed6e02c707cf21de43a10f83fd6. 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/QZFZ62082721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f290705d3f20a7d24c2d7cca8b6fccdad6dfa1a3e42fed3dee197e0e4dcd110. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZK6L2017802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c10185d899809141c4c1a7fb7f31052819239d7aee688e99726592f07b1baa5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:47:12Z), 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/QZDA72344128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cc9c5c52b92fab240fe64a2a2484030c9bb053440c8a64eafa3d8a84723b58. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ES71G2409573.