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 0xe39ee20c5e66241192bf91843f5873fa10fbbc69b3c4d7b2e9201998c0c72f9a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee31a07b-bb50-4e40-93d4-5278c53092c1.json and https://artists.proofprofile.net/proofs/artist/ee31a07b-bb50-4e40-93d4-5278c53092c1.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 0x982d356b52ef09832037f57cfca36fba3f5020ba8fcc9b7d4a2ad3a9265ae001. 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/QZK6K2106812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa889f6bfa5b1531d4ed0fb3fb30f62e67634372aabe4b01c8eff197af83e558d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMEQ2209082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898f763fa231baa35d9e9abecbe5aa2c2820092b1c1dcded36bd969dc3104fea. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:31:39Z), 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/QZFZ22314749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569f141bdf65250560c8731fe418edd2737bf3672e71105bcfce589f34a1b825. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ22314750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d1744c05957887305118992386382f0ee061a26db042e3010e5dd0d2697cf6. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:06:00Z), 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/QZES92305814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e79b4d2edeb3bf452456a6ddf045749f5c14949236f6d77521bb30ec8b1e47e. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:58:59Z), 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/QZMER2375906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce846decee3cdb958df58ec1950fb5b7290c282c32b7e9a2d0ee7061e7f3c2f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMER2375907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78838dc00ccd89e9037d0ed0358b5842b68891ac737fc945cb1219f98abdfe51. 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/QZMER2375908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7670e58e3c5f13fac3f586ed86fc499b0b13ad52a7dacb2a0842333948907e9a. 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/QZTAU2477581.