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 0xb2a294327fd7a015b5c31c83bce2c0f7e4d6abea373923e94a9fd8635d67a963. 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/5d1ebc35-705e-44ca-8170-ddd029af705c.json and https://artists.proofprofile.net/proofs/artist/5d1ebc35-705e-44ca-8170-ddd029af705c.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 0x3a00ee96d869a3e29d7da8f343c653fd94b34881105455f0fb568b874b667e02. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMEZE1949472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ac2b8c9ca94573ffd6063981b8eb135225c499a6ac8b6ee926656fdc7398fb. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:43Z), 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/TCAGA2244251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea2fcb48f3cc5de36bc445c45f80b52fdea8cbbe78b78c15b156aced38db775. 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/QZDA42351901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92fd55de99c630c33a5bf762f99f8f40ded1be86e450484609d383116538fd4. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:02:29Z), 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/QZHN72392314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f90129fda5d20ecb5007d3ab58c0f92a5ee69d82810f2bb45460f3fff704e1. 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/QZNWZ2348190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaeda171f53f7ac70cfad1d191536e3b9a4a0417fcd4e83b785495f5f8e6eac6. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZFZ62488077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25006344115dcbf92a593e7995eb5eb1e919c1409175c20f994a91d5dbfdb91. 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/QZNWR2448559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c22de224693236291792d29c62ed951bd86506bef58997fa2a5fdb8d0111c70. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:41:57Z), 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/QZK6N2436325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d93f662c84e4ed8ce2c460e1d8f0ed1e338b3609eb61046cbecc3a1a102539. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZHN32497195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b4ef2864acbda590cd4ac6d3771a8292016cf25cb08886995020763f34cac8. 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/QZTAZ2360883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789d07136aaac20ea09b49c68ff8bccb2cd3034377765ca7d0d9e65c71cf2c4f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:11:17Z), 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/QZWFS2457869.