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 0xced28fb0776d1db65bff0ba2cec236d77b77a24bcf2436c75196d7ac7deb793b. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d8d1eb0-c871-4f96-a6c0-9db66e38aaaf.json and https://artists.proofprofile.net/proofs/artist/9d8d1eb0-c871-4f96-a6c0-9db66e38aaaf.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 0x3e0bef00cb98ab099895779e2f57727247a17381ed165f70ec6d16f26c77a8ad. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/DEAR41899667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adf696e9b65fdac0ea117af563c52705627ac2e4af744e4cfa089d2877d9343. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZDA51910809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28239f39e602723ef27189f01f706ef9f29fe9f2ee9165d30ae97681c9f53f8f. 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/QZES91916138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b3d15b868288ed178e0af6fd2bafb1f7a26ea2c4f0bff986fc6fc2f07657fb. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:20:41Z), 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/DEAR42176358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf658e9d528304b2cbd691f89d6c4f97da1877398c126596d662a68574c13dc21. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DEPI82404026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de3aa05c1cad9a65a2ab45364a3b43efddf9e0c2a1a432a90c404658c1c93e0. 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/DEPI82322154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf352a4bc481646eb4824e51d8e909e5d814b2296f9181b3ae2add74cd019f1b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:23Z), 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/DEAR42425410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfddc44e467f93636c327065830ba8bf3875ea05aa1702ae5cd279b6c7b368f9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DE1JN2427099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c8f44855dc3682be7c5e376605080c93bed53cb32cf783a44bf624dcf5b78c. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DE1JN2426719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7206e2159c68719f371fe808e994033bea4325b287899daafdc8104206e67393. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/DE1JN2426656.