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 0xdc8ce7a6b91a8465c9571cbaa9c758d112a4abb9e4685f8a79291c167e6f974b. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9591cafe-bf05-45f5-a451-55e9d70a68a4.json and https://artists.proofprofile.net/proofs/artist/9591cafe-bf05-45f5-a451-55e9d70a68a4.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 0xf05e1bcc27bf02ece3b58a72307e48e7097c08f89e311b3c8d9d966cb0d3b850. 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/QZEZZ2100521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10265ee3c72d698ff585697b8ca0e1fdce4d71f80835af9a81c1bc71034648c8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZFZ62366083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0fd79912f6ed13aa9207b369962d0ca04c7d07e5239b121767d44238b2ac20. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:00:56Z), 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/QZK6L2393956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703d24007eb50d5dccb15ffac1f39a1cf83f8f8e25850122c229f55569838827. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTAW2382204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ea77b25323cd1c55bc62eba1041a4164e5fe1056edef9b0722fd8a84450b30. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:55Z), 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/QZWFR2399878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea742766f5c9bc290f4e19c0c4a7eff2e134aa898b48698dc62e71abfa01d73. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZMER2439530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc32163a2b61c8e8cf0309ba29ad60c148891de0510e2de3ea52f6f905386d7. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZFZ22530428.