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 0xd9b8ab1c04e52053a6f9e7dec42e73d465788e6b0aa5c24c6c66938a896c9abf. Chain 2 (Bitcoin): anchored in block 953689 (2026-06-14T20:27:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69c79bed-7715-453f-a0fa-df57744af30e.json and https://artists.proofprofile.net/proofs/artist/69c79bed-7715-453f-a0fa-df57744af30e.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 0xcbb53e17e61bf611131127a08224aa7f132fe52a87bb3d236b6f269612604ad3. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:01:31Z), 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/IEWNY2414650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1439eb09ea9f52aab432aebba30401b3e1a8beb5e2122ccd6637b0b9be77f6d8. 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/IEWNY2414651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2b7c8a3f05b4af794c58ca7604fd552d2d4a6c9eca95e86b86acfc6f607ddd. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:04:08Z), 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/IEWNY2416401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e35c54e5fd0a39c46db7e2e2599aacda4a27cec97ce739ad5c88364e87caae2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:26:32Z), 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/IEWNY2416402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4192b7a1ce8c5e68a4b0e07d20635eae8629558caa7c5e3c4cb1975961fc2ff4. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:08:55Z), 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/IEWNY2447753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8c3d7e229f0f751886485e1e83420bdac1fbe29fccd666ad7b382977af3b83. 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/IEWNY2447750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b2b140e3f0813b4cf8cfbb7b3d6e56eb4232dd6dbc9b942700f6cf6e072394. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IEWNY2447751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8759c9660154286f530e6c1b0d82d54f98d8c6e8e47f5d1158da5523fa10fc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IEWNY2447752.