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 0x128b600ca10170780c252c3e7c7ebfb1ddc254c65fe8ccd1a4276bb52601d20c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18c57961-96dc-43be-a9bd-63dbe810adaf.json and https://artists.proofprofile.net/proofs/artist/18c57961-96dc-43be-a9bd-63dbe810adaf.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 0x144eff2ad11b386eec09bdb88982c977715f3818479a28218c9e5c22fc099403. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN72175368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bdd930f1194114d9fb4e00705be27ef45797d3401c30774b65c974df74e563. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:49:34Z), 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/QZNWS2193592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c518b76940540ce23520b5f91d09fb04d80c6fc14459c998d5ab1f5fca995e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWX2170708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5575915e5cb0d5c0d502880752b200e96411d204976f3d5f83c56be05874e18. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZDA82219011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0598f5248a1356487c5592002f0f53205670b408e26c1902d5bf4c4db80533. 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/QZHN82258914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccf05bf44deb37db08f259c2f2c0a1924c65f6a4298dc0a81a63c0a9c7762cf. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZK6J2218638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9a732eff20cea76c6254dd80f82e50b05e4b94dbc3e34e252c8871db83afc1. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:36:25Z), 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/QZMEP2279108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b22741687f7b7ef281c1d15c726abb56588cbca383bed6667721002815c253. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:07:04Z), 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/QZFYY2433903.