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 0x2aae98adc7db7fc6fc454cf0cea24c0776dd5781d5e32952c3c3bc76ca941b8e. 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/0db6db97-098e-4a09-8a2c-eb75428a8d16.json and https://artists.proofprofile.net/proofs/artist/0db6db97-098e-4a09-8a2c-eb75428a8d16.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 0x3f46651615d98c185aa3b3ffe109552fab8d19650f50230ecdbad9776feb94c2. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7L2537481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c91d43ea0b3adb2b3eb83aca8efda560941acd5529b1477d05e07f7150b109. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7L2537482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9226a4dace44dfcfccfa8242724f7efeb7aa60ae136e8fa8dcaec0d807a03d6a. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZZ7L2537483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa453f3dffbb76ac71a71c51c0d0b21c77d823f5cbb9dadc7d45d6bb0a5af93. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7L2537484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e18744ab11441f03c31d6e620252e2aca0a775c463fb4ea39df2d00667f648. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7L2537485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5603437ce63b6e1680e091376b2e5ccecaa13e51c2229cadf6ce121800578d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZZ7L2537486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5412fb77702f036c328f8e5071239d2eec9d2c1104056e396bb743002b409f8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7L2537487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67faf8eb391728991a8afec37442e9d9c1b6f847dee65c0d8bea7b064e47726b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7L2537488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853b5a5550af21bacbd270a4519b8506ae756e4ac0acc2b3c511ee89e47fb7fb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7L2537489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc37a1e731e52eef96e4449d259b20fcd4b24f320144accdf3cf5d8b1ce9087. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7L2537491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06aab81a801164c8ad9657b61223d9264998bfafb8c985dcb80e9157d99b2b85. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7L2537492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45b9e3ab618851322d9a0ecbb94ef45ccf0ac3aecde375cf555c4a51db56a7d. 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/QZZ7L2537493.