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 0xe27e9a3915526f3c9307889f333ccacbb61358a1cc28730ecfe7ee3ac0303493. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1daefc2-397d-4b72-bf71-5a4ba155fbd1.json and https://artists.proofprofile.net/proofs/artist/f1daefc2-397d-4b72-bf71-5a4ba155fbd1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Erika Kolseth Sessions (Live from The Funk House)
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 0x9fd648f3b70466516ce5ac8fb025e93b0f8260688adfdb4704b727dfa873622f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:26:40Z), 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/QZHN62353281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac9f49d43f14db2b275ad867609812e05833c73d53d6a7ef4356870a515356d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:17:28Z), 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/QZHN62353282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9301e34160dd2e36a03381b02b192fe848b30d0c06b3b595c8c6082c15c226. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN62353283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592873110d8ac4b060fc77caaa531196b1c20ee0dd866da9fcf32be26d321108. 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/QZHN62353287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f6b9e38a32c90e97e61a15e416d2330ff21494f0ae92d37e777e5a29606446. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:09:03Z), 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/QZES52441784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f6b9e38a32c90e97e61a15e416d2330ff21494f0ae92d37e777e5a29606446. 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/QZES52441784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efe38292229d3c68723e9f9324b3cb3b25942fc3cabc6554b387f9981e9b030. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZWDE2466145.