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 0x09a24afe8757b9c772fd2e464a42fd137d87b4a84db3c9c1ef2597bbd657b09c. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b89c4ec4-1320-4451-8992-e2bea550104d.json and https://artists.proofprofile.net/proofs/artist/b89c4ec4-1320-4451-8992-e2bea550104d.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 0x067166c221b299e53061f04dee8bba53582ea9a68b51b15ed51abb29330b1220. 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/BKS5G2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ae79a025416e2926fb6679943c259067067ccd4d912930f0c91bf79b576648. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:00:16Z), 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/BKS5G2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb107169f7f94de54d75f48383dac750adce8baa25ed71ba7560cca0c161a6c7. 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/BKS5G2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067166c221b299e53061f04dee8bba53582ea9a68b51b15ed51abb29330b1220. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/BKS5G2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28229e5cc38e6d6c8f75f1e6bd0e0111ed7c153cd4b865e4d44268325d1f33f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/BKS5G2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cd06616c1b4c7d778e6fb3a57d8a4160e62e1252e7ca5c6264c24fb4e593ab. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BKS5G2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4d6a398fdad6b1cd46b9e221871949362f76e4c6a704dd013d8638ba79ed10. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:38:37Z), 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/BKS5G2400017.