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 0x6017f4d8ba7546f59eebb85cf5a16f399d0339f67e447941ee109a14a0063384. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acd6fc3a-ede1-409e-aaf0-e88a6e1c9165.json and https://artists.proofprofile.net/proofs/artist/acd6fc3a-ede1-409e-aaf0-e88a6e1c9165.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 0x066e9f51b3fa0ec2b3e4c0eba701bf463f0ac60f8e1e1c1d6ed3cf8a08ff83ef. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAEC1971587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30ed7d640cc04473d860bc677c1e27cb2bc2dd5a545fc351f8b17a8795ea9a3. 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/TCAET2055968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cd5347e64b513ae53cbc31151e5aced468f8138b2f80ca29a35abf5e9f8172. 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/TCAFC2095237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eadcd964fef10d66f6c900f77ea48588a964a0e045323062e6a13be1baa77a9. 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/TCAFE2093583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa186f791820840110d486bf9dcc06c81eec81bfafd0e85263b6ceb017b097e75. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCAFF2082663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6d62e5236f12896709bbc656a15dd5ba90351a38ff608ed09fe326411e7882. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAFH2008165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1737b32be7ac84489fa3c6a1699e54cc4730f30950787cbbb4c8e41d1e51c7ef. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAFE2038163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a94a4de99825de0f6862df9974abc19d58898c494bccf61786468dd1ec4b190. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAES2043695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784866ab8099ecaeb75ceb96ed21ae4a5bfa489d5081e7275d435e173e528464. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/TCAFM2162017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde367b6118419d07be048fe3b4578545351d4e2253d1c3c66cbc60543a6ff4da. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAFO2106211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc9503dafbd203c90c3a4d624f222e948b14fb1954acd391bbac1587c88dca4. 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/TCAFO2144469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae0c9a340d721407287f3c8033d5462294ac448baafb563667ccec517253acf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USLZJ2203401.