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 0xd9dd163ea1bdb725c7a2c6a98dcd7afe4d355b228d16d2d85bc3b4232d5dd0ff. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/638b9edf-b850-43a8-8d63-b5219055f3be.json and https://artists.proofprofile.net/proofs/artist/638b9edf-b850-43a8-8d63-b5219055f3be.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 0xa1d581b6b6ec4bd2283fe06bb97bddba8fde48852e04d967fc1b0a0302a78c21. 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/TCADS1807220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5cd613bac8363b03ede534866f5c708a5a8ef03a667c0049acf1ded6fe2a22. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:14:23Z), 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/TCAEQ2062079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e18f8c41daae1d74c12f6a55b3dbef930c00e04612034abac0e5114208d907. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAGB2239433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ded6287ab7b5ed8c4715200b9260d9d7b1fb15500035624b49326a4aa19b4e. 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/TCAIL2493673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e49a18acc92d22d7b106785fa22e71bf869c744e37b98f9027a3931e51ea5e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJT2577282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7d1795ebd1259fc256385135cc9e9ab2d46bc56695cb7829563ba3a0715a06. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:51:49Z), 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/TCAJS2577310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd35a2809b527422f2c1a941e41fb4fd60e5881d447ed3ea3157cf67fe0b8c43. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAJT2577318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea04463e66c06cb9c56b072be3c3e74db0fc9e929c567e43f29d0ff9e7b324bb. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAJS2577331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f97a246455c9a9109c971210bf9c1a48501920b6068d682485f82f6dd8b8a7. 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/TCAJS2577333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3c186bd3ac80f04388c15573ecd3feb48f96cee2b2132de769f69c7a8421d1. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/TCAJS2577342.