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 0xb3bcd41b59104bbff6535b06c1e2907f6ebb1b8d5e6285ff6cca6f44e16131ab. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9bc3f51-7c45-4e4e-9049-c1359fb42770.json and https://artists.proofprofile.net/proofs/artist/f9bc3f51-7c45-4e4e-9049-c1359fb42770.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 0xbd47faa6de70faf5b27dc560d8453274ea10b8c0882d6c11bb5ac2a082368bda. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEP2063328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7084cba307be84608d04259ce6180a58a0e62518ae3dbf0efbede046c3257c. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/TCAEC1993681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac254064489e353136c8376d9013e3a1e80081087a52fca93dbe265012c845a7. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:35:59Z), 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/QZHN41908650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729ee8b401587189a99a3f5496053d8bf1596deb535868ae15294767dde4faf0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN41908651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cd79340ba215de7cc4006a760d5fd3488bd1be0f0f593486fb0af5bf5ea6f4. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:00:51Z), 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/QZHN81996116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e245e8e50e65bf84e8ad40ffec5e178743eff0d03e0f1ed43429320a4b215d. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:35:47Z), 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/QZMEP2062285.