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 0xb973067a4e2fee42f6021e164a16d96ed2b23c7166ec72fc474372e30539fbea. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e50f6327-6518-4e04-b948-7b7a2e34df54.json and https://artists.proofprofile.net/proofs/artist/e50f6327-6518-4e04-b948-7b7a2e34df54.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 0xed615751caf4c4af9d9b1c2093f2d67daf0fe11252c5c3b81f94c0eca16dc713. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/LBA081103052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442559f8d757262ec21592c0cdb883ebd2cffaed45eb0ae6a89241d13fac6aa2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/LBA081103115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5807728b1736fe34feafb07cd4b4e5b54f29491972d3eb5d5a45b758154dfaf8. 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/LBA081103114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75edd2bc7c5bc7869f27d815360b868f84b77806a09af91261bfa7c2ae353c4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/LBA081103116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c3a7fff7b7921760634e5c5e395575cc3b98143f467d0b494bec9c7b0eaefc. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/LBA081103868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4a6a4e07a7e19a5cbcfca90391d1197013027d7100c3eae6aec75a8591bf8a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/LBA081103867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14798ff99da8725daaca91124a595bf49734feee3737253163927414340ddb54. 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/LBA081105370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d461d5e0d66652dc6054b57e55976766210e5fff2345117e92fa715e4b7e95. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:51:02Z), 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/LBA081105419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6ae7c5b3f2f54764dcf1d63bf6fa39c1d9a38138736d82d7897aa10244ca44. 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/LBA081106796.