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 0x6a910019a07006a3faf9a94a8027dcaae18598a8606aa00323aac90d780f4572. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4228cb98-9533-45fc-94bc-fb2d27cd9706.json and https://artists.proofprofile.net/proofs/artist/4228cb98-9533-45fc-94bc-fb2d27cd9706.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 0xca51074af786e6f67b84dcaf39a1024c43cba285536fbffc8dc2775de6661ab0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CAQ8S1624194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89589b58a518fbbdec7eb04fe93913b7e5b61c4e21a377d45530b1bba14825a5. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CAQ8S1625436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edd445596ca70b7f10af7a89c4fe5961766a4199804f2bacc2765d689ae13cd. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CAQ8S1628312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f2b2fef594d02abf28e31b9e2af76b44ad9d07bb8452977160d12bbf1d1c80. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAQ8S1631848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662b1a0cb6c3dd7913001fc97e2d49a18e1b7c8f63469578b2ed3cd6db5ba5e3. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/CAQ8S1632145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706934dc6d4644b6bc141cdecde626b8bd108bc24667b5ef7e4bdf02c37fd0a5. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CAQ8S1632838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699ebb7133c3d11fc75fe0a7115b6b65a86dbc3e9ca68d1208e585522135660c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CAQ8S1634708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409c7f8438c77fb2e22a758f0a9b4e09b29d0ae69c0611df81d5364494c21ca4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:06:29Z), 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/CAQ8S1644958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8581c5cb8da529473a3fe579ecb0179eda7f862ebf559024fa7ef92d1e3dfd4c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAQ8S1646011.