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 0xd8f1904cbfa634a6dfbeed0b2ae6bccc5bd7f9aec0ad36061509178bcd74b617. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afa23b79-40d3-4a7c-b0c5-803588103ccb.json and https://artists.proofprofile.net/proofs/artist/afa23b79-40d3-4a7c-b0c5-803588103ccb.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 0xd115cfb15a425f74defac7401b5fdacb383efd82b92a4aa01b37849700a36d68. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/NL8RL2500164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3db75d142143dbf4bd2f03333a619da3ea7c9be1cd834d1431ca88fd773644. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NL8RL2500165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bebf02cfdb040b6b0ba6cb81372ee8049c71a0a0678d149afac88b6ab1e3aa7. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/NL8RL2500166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76553f6083ee7bfb8189bac492caa282a293dcc39a182038366e83480e772275. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:32:23Z), 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/NL8RL2500167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc1d46163bc1db6eccf90063a33f951c6bcf246c95099a4249f37ea00c049e0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:58:32Z), 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/NL8RL2500172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0be728eda65d8919c219da4ad224b89e844d3f5ca5520505f41669b234b420. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:00:59Z), 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/NL8RL2519320.