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 0x8b45464db2d86a904e16a14536db6c36bc5206a12e6fea89b8a7a1f845e5f4b2. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7cd6580-fa88-42ee-830e-6d0a1f213310.json and https://artists.proofprofile.net/proofs/artist/b7cd6580-fa88-42ee-830e-6d0a1f213310.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 0x8081b855a3aea3eedc12d2851d0a92e7172b2d20fda846ee6a3fb5824df2b13a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:25:11Z), 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/JPW792222533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6132ba4f59c4ab6b7096f133082c383276eaef8ef58dee16b4705a35526d9631. 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/JPW792222534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9677042f56d409a6a27051879d3c691207b48edd27678a73aa71c8202587ee4d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/JPW792222535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4931fd07fe696dba1f0e5ac1359975be731e1442ef21d493b135637bb310df1. 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/JPW792222536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e10ecac08690b573c30cb0ca0855a6bdee4355857245ca08f0b79a3d611f661. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:50:26Z), 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/JPW792222537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22753dd9525cbf2b1150c2f2ac761e9620f4c745ddc66fd7674c8264947071a0. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:42:48Z), 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/JPW792222538.