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 0x7ed479841e7169a1c76788f557486574a5618b3f8d644be4ece8bb24972bbc24. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abeee98a-4bc1-4ff4-af52-43cc63a46f7d.json and https://artists.proofprofile.net/proofs/artist/abeee98a-4bc1-4ff4-af52-43cc63a46f7d.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 0x28438f259acd74eab5395e13d5fb5e5694614c16890d73a5988c006bc8b0f4b6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCHQ1000278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea409abe40a903feafe04cfea5ee489cd18fad85affddf649602d8b748c1659e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCHQ1000279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6665c9a9d0a95a8831df3f152faf4aaa20322785341c6e7bcbd422885b227e53. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USCHQ1000282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d20b1f1364bf475c32b8c51ee6fea0e0081f996676ef6599efe9c92cb987a9. 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/USCHQ1000283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54817682a92eb244c8114a0c9b5dcecf9f867adbde9b95f1bef2581dc3fd9ca. 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/USCHQ1000287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3071d176e19ae0ce483c0b7bf115ed7b065c00ca2259807203f99920418cf6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USQLG0910019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ad3e47295a60f81b3c153da39d8221fe2348845f126b54be9d3d567402f147. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:00:18Z), 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/USQLG0910023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a7e4fc7a7d1678057843d9f9970712af7cc2379fd132c0acf1452fcf11238d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:47:17Z), 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/USQLG0910027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310f87cf97ad9c4d684ac699d8777bf696d29d7a29586ba585bf4266888bc442. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USQLG0910028.