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 0x65477047798b2b565bc7b4a515a8689ef404331778af4e3fd4de862284101ede. 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/d0db2447-78a4-41fa-83df-52d351faa46a.json and https://artists.proofprofile.net/proofs/artist/d0db2447-78a4-41fa-83df-52d351faa46a.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 0xc9a77dca824e97a0e777f2795c9f81bc5343194f0bf9b3214d66acab73a3f671. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZES52503891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b8343bd5d35991ca3c0e96bade17924411bfbe4266544d9bfd94dcc3135377. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZES52503886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b67e0205c96322b582386795af26ba49834145d61ae7d43890321696b0b7057. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T04:56:34Z), 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/QZES52503897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909e8f02c5a5739a169d5383e78586ea3061c85ef312be466d398fab529dd0ca. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T04:56:17Z), 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/QZES52503889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b6150b5cc1dc55f188addba0d48c350c78f613bf7b1a2f13b57042b3502857. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:53:13Z), 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/QZES52503892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9005e394818799a8f3faaeaf496d4c36b8a57c107203b68b68247f1e9b81761. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:55:39Z), 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/QZES52503895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8f0e79ac832775d6243cbc48f5be164983956102ce0d099a97d67268d8a851. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZES52503893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e3e7e0269fb100468f8c3eba875be8d23ee1d4902ca14ea067f89e9c8e3207. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:33:28Z), 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/QZES52503890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030fc8509e2b938869b86e4c82577445b764eb5dd050aea9edb13fa7cafd6757. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:32:30Z), 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/QZES52503896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5c0e92d313eebed7a66b1b57dafa93e09d78f337ba0fc564acae0386e177f1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:33:00Z), 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/QZES52503887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e776191f886ce6e33b1537d5670852c388c93414f686a7eb59a8643649f64dd. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZES52503888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd050ef987df90102f518b77982b0f03837edd9ce502fbd1140c38e653c721c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:10:27Z), 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/QZAKB2361555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43aa72be75f0d2ac934667acfd77479913d4326bb057b5f322e73e340caade9a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:56:15Z), 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/QZAKB2361558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325d4f2ecdbeba40ec029f8292b39d4487da59cbc8252314cd371ff1afa097b2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZAKB2361556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a21e349bdabc711b5a3861908a284acfcedabf91f2fb2ff9b7cb90cb33c242. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZAKB2361559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33f4c031c67e2d1578e51b47fa04a6bd67a2b7be2bb03cd831896752e9daccf. 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/QZAKB2361557.