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 0xba6474eea43285f571dc99d0f13c2661a176ce88d24882a96a89a9e66fd81c7c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0f92623-c095-411b-b4ab-a04f0382476d.json and https://artists.proofprofile.net/proofs/artist/b0f92623-c095-411b-b4ab-a04f0382476d.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 0x660348faeb71eb9dce5bd74b1c31e2134e007c1fa283184be6cc099c40665f88. 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/QZNJV2333301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e682f270fe8ea25ab13ac1ad6d6292d2ca021e0325a3ffc999346a383623b52. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:40:27Z), 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/QZNJV2333302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad84c0a1b5693d4366e4cba58102c16f6395b26db950643af77b88a61b3dd60. 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/QZNJV2333303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adbfcbd3dfef150083537cb184475f2d0dd9c9fd0b54d437c1274f5ec42ff19. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNJV2333442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41afd6448974bd09ee5228ee27b40cf0a7ffbe3e094934de7233911621cbde94. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJZ2346894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadebdf210c053b1e2ee13b1dfbaba4c980fc54a90807be15bdbe0d7e3c51ac04. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:41:05Z), 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/QZNJZ2488473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898a39dcb0bf4beb3e0b1a7d7354e0edccb06c99f3c83afdc1c8512e47c9a8b7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:33:38Z), 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/QZW9K2475705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6942de967fea17d972d355eb9fb234a100d42ba96616207c38bf5c3c2ec7c4d1. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:08:51Z), 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/QZW9M2464250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ffb06863061048249eaa9d61fea32d0a06e33bc38f49ee57c053b8df12debe. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNJW2529356.