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 0x04d94a12af42752ea8c6867294c992fa1bdcfec6861e2cb7f1169f1fdbae2f66. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4bedd9d9-40bb-4846-862a-d05f79a5909e.json and https://artists.proofprofile.net/proofs/artist/4bedd9d9-40bb-4846-862a-d05f79a5909e.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 0xa8ea17e81faa93babcb40d57314b8ec9ca58f959d8b9cc67cfb9caf7cb24f44b. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/QZHN42442239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1861d0e29a9a9d17b588fbb2dca32bd6c88c196f43a1881ad77917e3142127d2. 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/QZK6N2427638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe05627df2ad1e43d2eb5e9a6731b1a358c6bc58ec023db234f54c89b31ef34b. 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/QZTBB2417863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c4ac3688eb8b49095130cb6782e80dedc686bf2128508e2aaed67943c02f91. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:40:52Z), 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/QZTBB2417864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697d21ab06855fea2eec632b5a1c28eef1131c7bc4b3b9d817c1b6e606310da7. 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/QZTBB2417865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46b5f39e035caf21125ff9146c51598c8d23caf2e93a5f07c5f1987568bdd07. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTBB2417866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a869b0db4d61853193fa9109109ad906afd651c8fda468f10f0fa52226fbae1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTBB2417868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e0153975ad9f7b773719fd98740861957322eb814214262dd0f11c800b8eff. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHN92598038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b572dd7ecaadcc97f9028ac916c96400f9527f2ef9a96677e73feb2f34c192. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN92598039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc8f20e304ebd4ef444b042af9730493ca4bf92970d42ad266e0de77b834240. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN92598040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6f8e9e848e5763bdd477f54ce824b0930dd1ae89239a0f8aa4b704028d232b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN92598041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc669fff8e1949c9e21c43c11e08b8831eb4a5c1ba3f41bdd05251f25de30dba0. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZHN92598042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053f895c97b20cf7a72263b48b8dbfc45bff9576ed3de56e1b6a43f6af4e2584. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTV32466858.