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 0xf951b5b060eea0014be876ccf6e2226f650d8af506b9e3a1f24084ede0fda80f. 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/0b9286b4-8e0a-4b7a-8a5a-0f379170f51f.json and https://artists.proofprofile.net/proofs/artist/0b9286b4-8e0a-4b7a-8a5a-0f379170f51f.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 0x47ed4e9034e725b11cdbfc69c25ad2558ecbc9385ec3ab57043ff20c4926af5e. 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/NLXN61600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfa1524e5c427617b2bc0fc30a01760591a517cf94c80dc350f60d05a9b7c06. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/NLXN61700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6053bb19a35d3e0c0265d0f53d1edb5f5042bb91cfcc610b787184a58c3c57fd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLXN61700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa78073332710a697468fe8f363379211e51c2ee92252c76f8f139a6f3efe141. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NLXN61900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d650b232881cc723f252df820e3e5c859de2334f7f537d283a93bc882e6f16. 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/NL1NR2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe679c2f72ec57c047e32b4bbf8e086df348964efa515f075dc0aa93f43ef4b64. 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/NLXN62100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc923102a3090cc36cc95165b3beb8793f67de91bd3b904217b494ad3cde83c57. 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/NLXN62300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c54bf8e6e8fa9b5da05c8f3f711cfb90aee1c57b8343a2c899e7771044ea760. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:51:51Z), 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/NLXN62300046.