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 0x705a5ae7bcfd978cb5d8ff799a942830918e53b39747d4a7374a629c9e55bac1. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2333cdfd-a904-4ee9-ad69-8001a0a93fe9.json and https://artists.proofprofile.net/proofs/artist/2333cdfd-a904-4ee9-ad69-8001a0a93fe9.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 0xf623553ebd588c1ba4a921f28792ebebe7fc733485fb3d6a2b50ef36902ad5e3. 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/ITL940900231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142f7d1f61d4edb1b20248faf12577e33b1bc77abaefe8aaa0cb86fa9f4b8841. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/ITL940900232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953af63f59b7f551a3d8f43e5e079868075f3e07ec246baa83a25c476ac334c1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:44:55Z), 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/ITL940900238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d72e804dcd94b3efa6b2d7f0056e202a41dce62749bb77d3a56d491ec1f51c2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ITL941100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0e5584a4d20251da5d6f49ef33510828e327372879522344c89d2961b9020e. 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/ITL941100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9894fb5ddd3fa37e322210ee20237e2b92e68e90967ffd6e8229c2864ea99051. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:58:08Z), 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/ITL941300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4491199b4f420c4c649ac8442dc49386c96b4a688ef6c3d75de5222f3f1ced0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRTKV1500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67466e3a2ae75b4a46c5b7431c4037c047a022c0ade80726759d966c33eb22f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRTKV1500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac8d2b807d70b52b611761b32affc55f1ebceadfeee8b2537626c4510082462. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITG370300018.