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 0x7348674123dd17fe57aab48e73ff1ce8286130a8cfd5cc7eed2f4ae5402a2e0d. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e030b5df-c71e-4d0b-b159-e1b455feb5fc.json and https://artists.proofprofile.net/proofs/artist/e030b5df-c71e-4d0b-b159-e1b455feb5fc.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 0x6833224d6bd5a818f4635b846da5cf3e05761d1c6639a9eee63d3f5322918cdf. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:00:13Z), 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/QZES82549672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b0a3c1b641e042d56d50a0720f2e765480283e7cb1f261a7e5ab8ff3db727c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZES92536483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf031865c5be577d62ee60099b94d5389bb84d40877ff63d966e11c93cfa77483. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZES92528500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1036ec704f8396543f2aa1bc55012afb063ddb7c6e269a33066568eb5b6e0eb9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZES92533587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d15cbc3ecfaf7e700f10d7ba14ea6d5ed78785b4eee89a626eed309d48e2348. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:31:59Z), 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/QZHN32543209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c495f8ca305f4f6968ec909c3169859427bd4c7fd39413ecc30135751c59cf3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHNB2577799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61534cfff3c45cb02a3f4efa46eddc0eda87c4d13d042479fadd592bd21a5de2. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:03:12Z), 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/QZK6G2532239.