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 0x2c7037dea67f3413ba053bd196bb933ae256a6b50d007edaa87bc3427951431a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7492501e-397f-4278-93cb-51846c8c0ee2.json and https://artists.proofprofile.net/proofs/artist/7492501e-397f-4278-93cb-51846c8c0ee2.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 0x112dfa6c24a71b45552dc335d70404c079bffa7d8e8aebc5595a9e77e705e744. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:44:54Z), 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/FR59R1657076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7f6753956cb16c9c179eaff64d3afa91e113be4c445ec17f90674ac30e2fe0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR59R1657077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb096a973391801f44d0207d70351c5f79bfc1be2f6833da6fcb6340d1558c92. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:41:19Z), 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/FR59R1657078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84d6deec4d747d0fb1cb94b22ae1382d55c1b60096410ac15a8519504c9df3e. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/FR59R1657079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225c87f82adfa026806e1ff366d81c1ed1bac44f11e5b5dc9a15fc354e768708. 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/FR59R1674046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f28d0984207fd161635fcd701ebf39d17057f01ba255698186edeee628447f. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:08:11Z), 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/FR96X1602010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee71a9c6973a0950c4292fc935315de24c19850e17e540bd26b14def8f08772. 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/FR96X1606095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1472527e5900747b11bd27c317bf276fc3c9902aec88f6349599927ce10b50. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FR96X1604326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bafc6d63ebc5efadc7ff5c907d5d0fef7774b79d0a1141f4e001d89b0af6418. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FXR752403459.