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 0x9946249e2fa57f9f872a321fb2026004cc6d0ce2b52577f686f6a11fd5a6fa13. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/738e3ac7-c43a-481e-81ec-3e5517ebc9e2.json and https://artists.proofprofile.net/proofs/artist/738e3ac7-c43a-481e-81ec-3e5517ebc9e2.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 0x13b996ff9c4201ac6588cbb1a1443a8ecb2bcc6ebf43160b685b127c96f03337. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZNWX2179584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810a959d5ac53e1d6952207528e3dcb1cf265ac514885ce528e2d50fdc918531. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:20:56Z), 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/QZNWX2179592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e75315082cb4595f4fcd56a3676db46127d2bd60e41bf431a763754764e9bbb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWX2175642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90794f4a927ade66ce7f80bb0f95bba51f6f06fcf3c7d89a418a58132e608c29. 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/QZNWX2176719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc34e61a9b06b14e6f72a7566f73b7ad252a3660a5ea1785c75d898d46ba929. 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/QZRP52179542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc978619ddcf3f2ec836f70f331a0776dfc3570f92310bb723c11690375574d85. 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/QZRP52179544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4b4363df28aa4d67b95aa12b2add6bd1a63bcb0814931518fb55e5ca00704a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZRP52179548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b792110ccc781ccf04b0351e6c45066b4c1a306a3979cf02458394faaa17b5d. 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/QZRP52179550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295c288164ccf78d4825f119a398c002112ca421f4d2b17d4f0e2e1d30d29db9. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZRP52179554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d2b3394fe00f809b4566bd363c3fc06286eaa282e3035da54e4d79eca4acbc. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZHN72302854.