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 0x56678a2d9d7c84ea3ad18db3825bbaba773ddd83505c5976bb341de434c8adf6. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/491bb210-1a06-47fd-9062-82775bf724e3.json and https://artists.proofprofile.net/proofs/artist/491bb210-1a06-47fd-9062-82775bf724e3.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 0xfbb55e6552f48bbea1025373df84d4622b022927fc2599c602bac1b44937f789. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USCGJ1791606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dccec6867f649354b9540cd1402d3dc7bed7ae8613cae4ed4a937391ead0894. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USCGJ1822808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba81b7a1977b2ad73420d5d5e4173a69ed39a331c8294927ef4890709ef5438. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:04:23Z), 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/USCGJ1822814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f42b315e4290d4101726abc2092bd2361b7be318651b53a6b76527aa8cf1bc8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCGJ1822821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643a27a6937b4051ef42ccb508dd4800f70818963feae068874b37a973f9c8db. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGJ1832254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc013e267f6ac7c9ea5f2d9b8f51ec39bf5a845bcbb1993786ae246d9b9993de. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USCGJ1832256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ae1f84e8986fa69431fa74cc0fbb42d6ed5445844d2a4a9b1e26f4ae221522. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:26:16Z), 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/USCGJ1832257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6157b0867c5698dbe56091381b08305eb1ea591c04c9b95bd3f3ec93a5e975. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USCGJ1832258.