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 0xe199ccf0cde4d0303858c20ca6ca8388effd4517abcdfbab197d1b245d755587. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef43765f-57c2-41ab-ac01-691717d6d9a1.json and https://artists.proofprofile.net/proofs/artist/ef43765f-57c2-41ab-ac01-691717d6d9a1.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 0x006e0cbeb69edb6bc042067004c19b72e6aa6c3f1f5f4593c5003a758690e2a6. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:38:29Z), 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/TCADI1749053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1eb20554614e243493278d2694b01095c6aea0b6b05498fa4b5b0fe8886f7c1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:41:55Z), 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/QZFZ61993812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6938bae0756b9731f9e4d1f5567534a1cc5b9fed9bbf36825e0a52395581b5b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZFZ61993804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f942b0c3ccab56bb14ec890d80ced27b822e9df018df4da2bbbd79dc77dfb2. 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/QZFZ61993805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e912b84df4604e3ce538a54744ac4e0c819f0e283ca14dfe3da9799579efdc5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ61993806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cc26919a5c5936b60aa52684d1ec81d9c8391e0ff8220d9939bc9287e25fd1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ61993807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579e500c02562b5daccedb60ec110bcfba200aaf4f095330e0d5075b3438257e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZFZ61993809.