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 0x49cea06a161f43d6d4fff5dc2a194c4aa739012f8b859c200719a703481dc411. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4401574-b2c9-4702-8406-bab62fb6fcff.json and https://artists.proofprofile.net/proofs/artist/c4401574-b2c9-4702-8406-bab62fb6fcff.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 0x09db3baaa4a8c7af8b0f9c6371888f3e3f7cf9533efc110a73d79e3ff38dc76c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGWW1912240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83770488682775ba8ecadfb1f7c8ea0b2d5b0cb2572d3609f7a597f7aea42887. 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/QZK6K2597337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a62480744342370a18950b4da34fe2989c541ddb002c28b3daeec9b175150b. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZMEM2511013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a1572febe4eaebd5f4bcfc003d9f29c87925dd4938dfdfe35b4f22e06be5fe. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMEM2511014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e55fb673f174a031fc089c8740b243631c90d061e1f615e66cd2d670ba84035. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMEM2511015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25500fabcfd32d7b10133ecf5eeb8d921191596eea9f8b79d2768f2d85d36d74. 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/QZMEM2511016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9642efe164f1100eaf725abad210e00959eb9584dd727481bad3748646c3fea. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEM2511017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593043184f945f8810eef8561a18c57ee9e55d35bc4d091352c5c8fe5fdc61ea. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEM2511018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83770488682775ba8ecadfb1f7c8ea0b2d5b0cb2572d3609f7a597f7aea42887. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZK6K2597337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca06921d9ad56aa83ce7c6b2b5bba8572ec8697e8d7a443f0705fffddd6dc9e. 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/QZMEM2511019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed43dc56adc9843255c45f0a9e05bc30ea0ae4d68ae347cf58de1442016698cf. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZMEM2511020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4029a7d3b1d33c517984da9773ced9cded032e94187c9b987f47c16c5aea5781. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZMEM2511021.