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 0xc483063d3660050f9e5cb441576b81dd285e5a7943249e1c6ec0b846e248627d. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45a100ef-8937-43ae-a00f-ab822bfd3332.json and https://artists.proofprofile.net/proofs/artist/45a100ef-8937-43ae-a00f-ab822bfd3332.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 0x5bed4588e4dfd4458b05653a9ce00ac85ae738cea5c5e62251af9e1f1db29582. 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/QZES72347736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2f6d5f79073ce6b101411ff576224312ec7f6c780b881e875658fff7beaf66. 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/ZAC582401596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bed4588e4dfd4458b05653a9ce00ac85ae738cea5c5e62251af9e1f1db29582. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:27:43Z), 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/QZES72347736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481f8976ded7db81bf88ef21a64e6e3ad29d3f02d8aec3a5fab8425aeac1957d. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:18Z), 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/QZHN92473276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70ebb82d2c0c8428c18c2d902bc2c5280c21fb8aa2d385ee8acdce06876bd1a. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZFZ22488559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace26b7204d58df2e725c53e95c8102c3af70879c81d7d312832731229d0cbb6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ZAC582500570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43912271066e725d8ccd27cd7edb3cfa7938961bffa7bbb25f953e86aaf1d4c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/ZAC582500910.