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 0x7239f48635b7946cdebf002b5f3b96726aeb4e55d5796a89b7295b1be27c1125. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fbd3447-94a2-4553-85cf-6f507a6fa422.json and https://artists.proofprofile.net/proofs/artist/8fbd3447-94a2-4553-85cf-6f507a6fa422.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 0x355a4b813cfb507e3374609c2a4c69ed3e8a4d09eab4cd7ae1ae47239b9d637e. 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/ITPFF1500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194573a5ef29454eacdcb37e88e9414a18eaafb3fb1875d93a640038b1f5e648. Chain 2 (Bitcoin): anchored in block 957648 (2026-07-12T03:52:24Z), 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/ITPFF1500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bd09939bc3e98ad1128c55a6583f0082d10acb0309dbd827d9fe1287311fff. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:06:37Z), 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/ITUNS1900053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5e4b4d54506bec447758cd1e7261dadad9e092afa75192f3eb925f903669ad. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ITUNS1900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fcd8780ffdf5af314f057038e49f7c830b8006f3e9f39664781bdd56e5e681. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:28:46Z), 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/ITUNS1900059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4181984ef37afa75a5483a1e7348caefe1320014cedcfcb1bc7011cd95ee2dd. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/ITX282300034.