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 0xde9fbf334188cd75f014287d77123358d5d9a5068d024cb27ccd65bf0a03edcd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c7cf46a-43fa-429f-af77-67b7b37d08c5.json and https://artists.proofprofile.net/proofs/artist/6c7cf46a-43fa-429f-af77-67b7b37d08c5.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 0xdd73b0e61d2e350bf6750b99aae560127f9886c20c92a40367eb073622d31144. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:00:22Z), 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/TR2610600119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a8c27abe6285e2086733c7029567401e23bc6230f43f8398223d450b09c1b0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:31:35Z), 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/TR2611301194.
ISTANBUL70 : Disco, Psych, Folk Edits by Barış K Vol.6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4b16057ecb14c6647d8151d779703744d8c2cf9d5e09b91d2078ba67126b6e. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USA2B2100767.
ISTANBUL70 : Disco, Psych, Folk Edits by Barış K Vol.3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acf474648e5b119ebe5339f62cba92fa919447aae028947eefac9c8e064832a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:40:27Z), 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/USA2B2100755.