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 0x7890e15587dc01dc8921ce91bbee271e63a38af18938f30caa4cd69ad3aadd30. 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/499b2daa-757b-4d5f-8df8-f0b8f934795a.json and https://artists.proofprofile.net/proofs/artist/499b2daa-757b-4d5f-8df8-f0b8f934795a.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 0x9a8575b0cf15fe27aecdfe9ae923fae3645231a28e6b48aeb8c27cb8f4d7bacf. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHZ32135444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecabd17ebb871560b8d570c15b40019989605cc1b37eefe7cc2f331853e0c668. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZHZ32135447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9761ac3a495a4124eb3bb79e04465595be1d497fb6fe2424f7db22e7d0eedc01. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHZ32135446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa060fd8d25b78b0c90f56b8fff7a332b8d7bcbbeb3431e1bdd55563617460cfc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHZ32135456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20823b47d194db33d3d53b814eae350c73f724ac3add98b99fc99630df589ecc. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:51:43Z), 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/QZHZ32135448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2553ec0a1dcf09c1b767082d790475126a9d5a0c88698ab542813a6c15ca037. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZW9L2265677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecff02356bb3b17251a6144d5a0c14c03a7c36beb48f58493363f4d27816a049. 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/QZMZ92329278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba2cd949e157a5b0b47b896f0020d3d985796147aaf8793d48ad49ed7fa23c0. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZMZ92393080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2585cd6278b3c8aa31d7ad2461f1ddeae19b508dcfa16d5dbecfc3261f054fb3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTVM2520564.