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 0x6ea54ee5a2ca792f51ec298171fed2272e43b9022859a6868e2c0d074a798bf0. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9e12114-1296-4e36-892c-f3005dcd16ad.json and https://artists.proofprofile.net/proofs/artist/e9e12114-1296-4e36-892c-f3005dcd16ad.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 0x5b5a07814994763e31389e9c0232d1c160da2a6db640eaf163bd75a4910d1df6. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:25:26Z), 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/EGA010507064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddf0c2dfc0b772da55c9dc2dc75835ae64452681abd17d7b266c460bbee7f29. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/EGA010507190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a33c1cd38202dac2043e21b0fd25274e23ea9947d1bc296849f7307b012099. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:54:38Z), 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/EGA020500325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f87358ae7bb294587f2f316fc02d4426b12ceb4e8da72fdbe85b594ea57500. 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/FRX281919677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82b7dd3e06a268d7f598194b7ba3abd728b1d51f830dfe703ea5ad0dd013ff3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/EGA020500321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a33c1cd38202dac2043e21b0fd25274e23ea9947d1bc296849f7307b012099. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/EGA020500325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf4c7064f9993cb1ef607b6dfcfdda107c85ea9635a307e77a09b3f8c0295ed. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/EGA020500282.