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 0x5a27c32a94f735b1674fd57ae469e9b92a944151b2bfdb1b63c93d269e331f0e. 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/9eecd080-cf8d-443d-a68e-ccb9fae8bb1d.json and https://artists.proofprofile.net/proofs/artist/9eecd080-cf8d-443d-a68e-ccb9fae8bb1d.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 0xed4ed00c5a2f540cf563c3d51f74b54aafc2d6b5796dca1a94c6473af2c8bb8f. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:14:27Z), 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/FRX452264106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04d4f455fbad4a2eac0d80db9d3edbc80dc49f1f0f0777e72bbdc6736348df8. 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/QZNJY2494489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5931eaaad6c5afa4c81a26ea0f3521ea706d4c1e440859ff9d395d0c86907b7. 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/QZNJZ2490931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e0deeb801ffb131ecb879e19d13483f480f643808cc2d0115f6858fbe75226. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZNJZ2490933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de4652bf2e7b5a4e2b1a6dbdcc6f6626b8af1067182a85de64031b97d7be59b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:35:04Z), 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/QZNJZ2485460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a25d5ce1aefe707dace19ba4fa1ea41f6bc406d83e931d6589cbc902154469. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZNJZ2485469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0eaae0d9e31a53ee0341503d10f8ee441055d0fd72ca9b234c6ad6aeb0c0a6a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:09:34Z), 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/QZNJZ2485471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5931eaaad6c5afa4c81a26ea0f3521ea706d4c1e440859ff9d395d0c86907b7. 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/QZNJZ2490931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e0deeb801ffb131ecb879e19d13483f480f643808cc2d0115f6858fbe75226. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNJZ2490933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ae87fed609e1ee664ed0ca9734a42caacd0405f1fe92112c492cbeebd7ce9e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTVM2416676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ae87fed609e1ee664ed0ca9734a42caacd0405f1fe92112c492cbeebd7ce9e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:26:25Z), 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/QZTVM2416676.