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 0xb6ee840ee04fa91f5233ed7ca0f5559715fff8128279c01c6979b2d469728d8b. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a45ba340-9cd3-4db6-a4d2-a737033eada5.json and https://artists.proofprofile.net/proofs/artist/a45ba340-9cd3-4db6-a4d2-a737033eada5.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 0x9d1782b37ce719c4cbda77a8124bfc0ebcd278e3138889f6bdf46c465ccabc57. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:23:01Z), 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/US6R21496985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061ad40ac02aa697e6fe6b3ebbdcac98a3772393df1df33a2a0e4104e2eb4e58. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US6R21496986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7be19cea60b32aecaddd38a1850f9bade829581d23d3e712e03b8a030712374. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMFME1469483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3f002e89d00bc61f1fbf40551e7e22228f1c503f7d2d279c6af894f0f26f16. 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/QMFME1469486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4790eb4783f528d945d5c4ce9d27a0f7ef5f1e15c8e9ef961e8b0b1260b20d84. 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/QMFME1469490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb98441c3095946749eb95b7a5bf8d5cd6cdd706dce3226151f75757434f306. 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/QMFME1469491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d49db7ffe9a9800aafbe010a8ee69636ae42ee6406fd68ca51e8ab242f98d34. 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/ZA54C1300312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35895556a67e92d484b6120c126ee79226f50f00fe8f0b877a2facaddcee0b9. 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/ZA54C1300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa878fa08b6b7d87fac7a8595450faa4665702f134c2c474fac19061b1a3050. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:00:22Z), 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/ZA54C1300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32545301ab3ff9a964adcf97d40305b7e8a1d052e024b1399719549c6bfd4358. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/ZA54C1300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c1337294f9ff2cbb505fcc0ee07b6db77cae6fd666fa6e09f0f3df2846e45e. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/ZA54C1300323.