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 0x0d68995252801df31dca77cd340c0de8026b71a6c23ef65d2813e4ee9c6c6b07. Chain 2 (Bitcoin): anchored in block 954031 (2026-06-17T01:43:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a2e0ba7-435b-471d-a676-3bc3246cf22c.json and https://artists.proofprofile.net/proofs/artist/3a2e0ba7-435b-471d-a676-3bc3246cf22c.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 0x781442669321bc4bf0177f464606f7eca2d7b70424f8d33c8c35ae7d8268542a. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZES92064559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a467881fda75423e062946ae996a1cf4c78ebbabe6a8a72498350c8f18ce5d1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZFYX2422979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218ce976bb63c2a7bd2abd584c5e22336d4e0afed26c7ac8481245fab7f660de. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFR2419274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c8059f257fdc5b51341e578ad3ff8fe06f5a74d23e8b7d64554ede79b090da. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWR2594613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb386ad63f3053c8d48133cc0a39d0dc0163f4822f695821c9564304d58ffe54d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:45:03Z), 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/QZRP42552963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60175344156af4f949361baccaccc37030fdf0e8e32653b9e2baad1ac719013a. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:36:46Z), 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/QZTB22539996.