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 0x7c6619bcf6a02b5632b873a2e7fc9f8c1273188310df826e94efdcc28befaf96. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2ea76c7-5c7b-4f9b-8d4a-e821a18174ba.json and https://artists.proofprofile.net/proofs/artist/f2ea76c7-5c7b-4f9b-8d4a-e821a18174ba.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 0xc38b81f3eee5ef0c890a3ca57ade09d84d381fb7cb57bb6e5c7b07d9e15b3552. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/SKA129133902.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d14705fd2764fc55d2bdfaeb95ed58d2edea0223c0324a350861dadbd3c897. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SKA129133905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ce611f4a769976a67a088d608bea093678b9585d2dd0addec013bc8cf75ed2. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/SKA129082501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68db8ab1ad680648ad3729fd29c5f40cd716a3fb0ac64355e54e944cd684267d. 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/SKA129082502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5381640e3932d5eb0d2a7065e707115e189eb70b0661615e3d4234a8284e3809. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:31:49Z), 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/SKA129082503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0b527bf021b215951e8b1925f63d4c104c4879e5af4e38b4c0483559d6804c. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:19:13Z), 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/SKA129082504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0366142a9ca33643740de6b9bb82cf83ddb98cd32afc6b15c38275346bb30bc7. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/SKA129082507.