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 0x8aa639897a8dab5352d88111b923b15204c8dd45e099f8bd228424c27456b2a8. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c49dd460-90fc-49b6-b28c-74944350c745.json and https://artists.proofprofile.net/proofs/artist/c49dd460-90fc-49b6-b28c-74944350c745.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 0x2bd4c18d84a2ec54daf6c6c48ae03d6529f59e09d1a62bf03a8a9da46d0bb0b1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ42590206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b5de0bb6b5b16d33d081ac8819e7ea75347fb89b2f79c103a5ba329be94b54. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ62511675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e230c40792eb48e1eb9a6c289efca717912f24c9de06e84f8091535f932769. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZFZ62511676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807fdc07ecf0133f21b0e57f6eb744af513d2d7b63e2c3c064651a6dd2bf4d00. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:47:54Z), 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/QZFZ62511677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f1bdbe3414a61103c93497729c84ff7a72f6311689e41af65a6a2686815115. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:40:08Z), 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/QZFZ62511678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813b83c111611bc0199f2d008fbfb4379cd72b756a24b524c445b891053b2875. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:02:01Z), 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/QZTAS2533823.