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 0xac52a7221620b8dac1e4307b29763c544ad634de4b9e198fc05b86f8c9217a7e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4effc0a6-ebce-4d16-a463-4095c9fa92b7.json and https://artists.proofprofile.net/proofs/artist/4effc0a6-ebce-4d16-a463-4095c9fa92b7.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 0x03dca6b134254fa470c850c3cd24f0d7a5e12c13f93913269e819a2638cc0ce4. 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/QZK6P2099426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff654f237e2902d07d34d77f17286c491e272004cda8f945f5f0afe111455aca. 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/QZK6N2000298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d9c1bf3ce4ef657f848f3ed1d5b1323b8684f35e64c2ace53c7264093005b4. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:32:16Z), 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/QZMER2034593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc094cc07a32bf8ae8a5f6f6910c3e360c3ad56310886b46f832ee01161b2b811. 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/QZHN42176922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a350760ef4315421855e0b5d5b2602eea69b1580a82361046d9f767c69c984. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/QZFZ72217488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3751b63649a996b3ba4e61e74e15469601493b3983cb97f9605ddcfa6ff9f078. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:35:45Z), 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/QZK6P2221895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5eae2a3c0b559aca7e76861bf133a7b13ccb734c202dad875bdba51dc1f820. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZMEQ2297291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1574578e267f115592d3aee0668435705a25941f1ff4ecd075bcc0fb3a4766fa. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:49:09Z), 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/QZNWV2211555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71f7cc752f922259a057a99e74624abbebf99b327ab3d57db4a285c0d8305f9. 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/QZPLS2274615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee38f7ccd2cc1302b72a5e90422f391fd1d6ae66caa554b87869645ed1d1e2f3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB32205233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ebddd51cd9fe76622587e35892aa4c2a953c16071b920a54220fe6e5bdae72. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZTBA2211476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf853cbf5966e9c8c38c8d5f058809a8d03f74c9c124597f5bef34d44ac7cd8a5. 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/QZHN42367822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3d64b7a00ab0d5637edd39a5206245f73e9eda5fcad7d7f6bd1e35c35107fb. 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/QZNWQ2345025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000235277fafd73b12ae227107c29c6c8b50ec688488cf7ce5135ffd15936aa6. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/QZTB22342668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc1b36bc10d1231e29b8d7f165a12e3ae463cc2c33219a2e7c35f1c076e1e9e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB82389177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e218f4bf9720331c546b35cc05933a85659434f5c991305e75a05b2d80b22f5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:59:56Z), 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/QZFZ22439800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe650e2e7c39970c3018bc1ed8e27fc070073e68e4728a516ac7a14e770ec2e65. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZFZ22443844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d120c588ab3475ca1b06565da6ba1fd25898c806a15d40af3ef8dc9899f9666. 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/QZFZ62430425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4f0785d6ccc46b782a3b5ace4fccdcc1b31e4f6e2f02fcc753f39e5020fc02. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:07:18Z), 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/QZWFM2415056.